diff --git a/loko/mobile/tests.py b/loko/mobile/tests.py
index 6b10ce9..047aac4 100644
--- a/loko/mobile/tests.py
+++ b/loko/mobile/tests.py
@@ -337,4 +337,57 @@ class MobilePurchaseOrderFromPdfTests(TestCase):
         self.assertEqual(po.documents.first().name, "Photo_mobile_1.jpg")
         self.assertFalse(os.path.exists(tmp_p))
 
+    def test_mobile_purchase_order_from_pdf_suggests_product_default_location(self):
+        from unittest.mock import patch
+        from django.core.files.uploadedfile import SimpleUploadedFile
+        from stock.models import WarehouseLocation
+
+        loc_mob_specific = WarehouseLocation.objects.create(
+            warehouse=self.warehouse,
+            name="Zone Rayon Spécifique Mob",
+            code="LOC-MOB-SPECIFIC",
+            is_default=False,
+        )
+        self.product.authorized_locations.add(loc_mob_specific)
+
+        url = reverse("mobile:purchase_order_from_pdf_mobile")
+        file1 = SimpleUploadedFile("photo_mob.jpg", b"\xff\xd8\xff\xe0mockjpg", content_type="image/jpeg")
+
+        mock_res = {
+            'is_ocr': True,
+            'is_image': True,
+            'is_multi_image': False,
+            'image_count': 1,
+            'total_items': 1,
+            'metadata': {'supplier_name': 'Fournisseur Mobile Test', 'quote_number': 'MOB-OF-99'},
+            'matched_supplier': self.supplier,
+            'items': [{
+                'reference': 'REF-1',
+                'name': 'Mètre Ruban Test Mobile',
+                'quantity': 2,
+                'unit': 'piece',
+                'raw_unit': 'Piece',
+                'gross_unit_price': 15.50,
+                'discount': '0%',
+                'unit_price': 15.50,
+                'total_amount': 31.00,
+                'vat_rate': 21.0,
+                'matched_product_id': self.product.id,
+                'matched_product_name': self.product.name,
+                'matched_product_code': self.product.code,
+            }],
+        }
+
+        with patch("stock.pdf_parser.PdfQuoteParser.parse", return_value=mock_res):
+            response = self.client.post(url, {
+                "action": "parse_pdf",
+                "warehouse": self.warehouse.pk,
+                "pdf_file": [file1],
+            })
+
+        self.assertEqual(response.status_code, 200)
+        items = response.context["parse_result"]["items"]
+        self.assertEqual(items[0]["suggested_location_id"], loc_mob_specific.id)
+        self.assertIn(f'value="{loc_mob_specific.id}" selected', response.content.decode())
+
 
diff --git a/loko/mobile/views.py b/loko/mobile/views.py
index 92cfda2..9376adb 100644
--- a/loko/mobile/views.py
+++ b/loko/mobile/views.py
@@ -1271,7 +1271,13 @@ def purchase_order_from_pdf_mobile(request):
                     location_id = request.POST.get(f'item_{i}_location')
                     location = WarehouseLocation.objects.filter(warehouse=warehouse, pk=location_id).first()
                     if not location:
-                        location = warehouse.locations.filter(is_default=True).first() or warehouse.locations.first()
+                        from stock.models import get_product_default_locations_map
+                        prod_locs = get_product_default_locations_map(warehouse, [product.id])
+                        def_loc_id = prod_locs.get(product.id)
+                        if def_loc_id:
+                            location = WarehouseLocation.objects.filter(warehouse=warehouse, pk=def_loc_id).first()
+                        if not location:
+                            location = warehouse.locations.filter(is_default=True).first() or warehouse.locations.first()
 
                     PurchaseOrderItem.objects.create(
                         purchase_order=order,
@@ -1332,9 +1338,32 @@ def purchase_order_from_pdf_mobile(request):
 
     locations = []
     default_location = None
+    product_locations_map = {}
+    product_locations_json = "{}"
     if warehouse:
+        from stock.models import get_product_default_locations_map
         locations = warehouse.locations.all().order_by('name')
         default_location = warehouse.locations.filter(is_default=True).first() or locations.first()
+        product_locations_map = get_product_default_locations_map(warehouse)
+        product_locations_json = json.dumps(product_locations_map)
+
+        if parse_result and 'items' in parse_result:
+            for item in parse_result['items']:
+                matched_pid = item.get('matched_product_id')
+                if not matched_pid and item.get('matched_product'):
+                    matched_obj = item['matched_product']
+                    matched_pid = getattr(matched_obj, 'id', None)
+                    item['matched_product_id'] = matched_pid
+                    if 'matched_product_name' not in item:
+                        item['matched_product_name'] = getattr(matched_obj, 'name', '')
+                    if 'matched_product_code' not in item:
+                        item['matched_product_code'] = getattr(matched_obj, 'code', '')
+                if matched_pid and matched_pid in product_locations_map:
+                    item['suggested_location_id'] = product_locations_map[matched_pid]
+                elif default_location:
+                    item['suggested_location_id'] = default_location.id
+                else:
+                    item['suggested_location_id'] = None
 
     return render(request, 'stock/mobile/purchase_order_from_pdf_mobile.html', {
         'step': step,
@@ -1342,6 +1371,8 @@ def purchase_order_from_pdf_mobile(request):
         'selected_warehouse': warehouse,
         'locations': locations,
         'default_location': default_location,
+        'product_locations_map': product_locations_map,
+        'product_locations_json': product_locations_json,
         'suppliers': suppliers,
         'categories': categories,
         'products': products,
diff --git a/loko/stock/models.py b/loko/stock/models.py
index 9529dbe..cffb905 100644
--- a/loko/stock/models.py
+++ b/loko/stock/models.py
@@ -367,6 +367,18 @@ class Product(models.Model):
             product=self, purchase_order__status__in=["pending", "ordered"]
         ).exists()
 
+    def get_default_location(self, warehouse):
+        """
+        Retourne l'emplacement de stockage par défaut pour ce produit dans un entrepôt donné.
+        """
+        if not warehouse or not self.pk:
+            return None
+        loc_map = get_product_default_locations_map(warehouse, product_ids=[self.pk])
+        loc_id = loc_map.get(self.pk)
+        if loc_id:
+            return warehouse.locations.filter(pk=loc_id).first()
+        return None
+
 
 def notify_supervisors_pending_product(product, created_by=None):
     """Notifie les superviseurs / admins qu'un nouveau produit attend validation."""
@@ -441,6 +453,97 @@ class Stock(models.Model):
         self.product.update_total_stock()
 
 
+def get_product_default_locations_map(warehouse, product_ids=None):
+    """
+    Retourne un dictionnaire {product_id: location_id} pour les produits donnés
+    (ou tous les produits actifs si non spécifié) dans l'entrepôt spécifié.
+
+    Règles de détermination de l'emplacement par défaut :
+    1. Si le produit possède des emplacements autorisés dans cet entrepôt :
+       a. L'emplacement autorisé marqué is_default=True pour l'entrepôt s'il existe.
+       b. L'emplacement autorisé ayant le plus de stock (> 0).
+       c. Le premier emplacement autorisé (ordre alphabétique).
+    2. Si le produit n'a pas d'emplacement autorisé restreint dans cet entrepôt :
+       a. L'emplacement de cet entrepôt où le produit a déjà du stock (> 0, quantité max).
+       b. L'emplacement par défaut de l'entrepôt (is_default=True).
+       c. Le premier emplacement de l'entrepôt.
+    """
+    if not warehouse:
+        return {}
+
+    locations = list(warehouse.locations.all().order_by('name'))
+    if not locations:
+        return {}
+
+    wh_default_loc = next((l for l in locations if l.is_default), locations[0])
+    wh_default_loc_id = wh_default_loc.id if wh_default_loc else None
+    wh_loc_ids = {l.id for l in locations}
+    loc_is_default = {l.id: l.is_default for l in locations}
+
+    # 1. Emplacements autorisés par produit pour cet entrepôt
+    auth_m2m = Product.authorized_locations.through.objects.filter(
+        warehouselocation_id__in=wh_loc_ids
+    )
+    if product_ids is not None:
+        auth_m2m = auth_m2m.filter(product_id__in=product_ids)
+
+    product_auth_locs = {}
+    for entry in auth_m2m.values('product_id', 'warehouselocation_id'):
+        p_id = entry['product_id']
+        l_id = entry['warehouselocation_id']
+        product_auth_locs.setdefault(p_id, []).append(l_id)
+
+    # 2. Stocks existants dans cet entrepôt
+    stock_qs = Stock.objects.filter(
+        location__warehouse=warehouse,
+        quantity__gt=0
+    )
+    if product_ids is not None:
+        stock_qs = stock_qs.filter(product_id__in=product_ids)
+
+    # Organiser les stocks par produit triés par quantité décroissante
+    stock_by_product = {}
+    for s in stock_qs.values('product_id', 'location_id', 'quantity').order_by('-quantity'):
+        stock_by_product.setdefault(s['product_id'], []).append((s['location_id'], s['quantity']))
+
+    # 3. Liste des identifiants produits cibles
+    if product_ids is not None:
+        target_pids = list(product_ids)
+    else:
+        target_pids = list(Product.objects.filter(is_active=True).values_list('id', flat=True))
+
+    result_map = {}
+    for p_id in target_pids:
+        auth_ids = product_auth_locs.get(p_id)
+        if auth_ids:
+            # 1a. Emplacement autorisé avec is_default
+            def_auth = next((l_id for l_id in auth_ids if loc_is_default.get(l_id)), None)
+            if def_auth:
+                result_map[p_id] = def_auth
+                continue
+
+            # 1b. Emplacement autorisé avec stock > 0
+            stocks = stock_by_product.get(p_id, [])
+            stock_auth = next((l_id for (l_id, qty) in stocks if l_id in auth_ids), None)
+            if stock_auth:
+                result_map[p_id] = stock_auth
+                continue
+
+            # 1c. Premier emplacement autorisé
+            result_map[p_id] = auth_ids[0]
+        else:
+            # 2a. Emplacement de cet entrepôt avec stock > 0
+            stocks = stock_by_product.get(p_id, [])
+            if stocks:
+                result_map[p_id] = stocks[0][0]
+                continue
+
+            # 2b / 2c. Emplacement par défaut de l'entrepôt
+            result_map[p_id] = wh_default_loc_id
+
+    return result_map
+
+
 class StockMovementBatch(models.Model):
     """Regroupe un ensemble de mouvements de stock créés simultanément."""
     TYPE_IN = "in"
diff --git a/loko/stock/templates/stock/mobile/purchase_order_from_pdf_mobile.html b/loko/stock/templates/stock/mobile/purchase_order_from_pdf_mobile.html
index 96c5803..223fc4b 100644
--- a/loko/stock/templates/stock/mobile/purchase_order_from_pdf_mobile.html
+++ b/loko/stock/templates/stock/mobile/purchase_order_from_pdf_mobile.html
@@ -348,9 +348,9 @@
 
                     <!-- Rapprochement produit du catalogue -->
                     <div class="mb-2">
-                        {% if item.matched_product %}
+                        {% if item.matched_product_id %}
                             <div class="badge bg-success-subtle text-success border border-success-subtle mb-1 w-100 text-start text-truncate" id="matched-label-{{ idx }}">
-                                <i class="bi bi-check-circle me-1"></i>{% translate "Associé à :" %} {{ item.matched_product.name }}
+                                <i class="bi bi-check-circle me-1"></i>{% translate "Associé à :" %} {{ item.matched_product_name }}
                             </div>
                         {% else %}
                             <div class="badge bg-warning-subtle text-warning-emphasis border border-warning-subtle mb-1 w-100 text-start text-truncate" id="matched-label-{{ idx }}">
@@ -361,7 +361,7 @@
                         <select name="item_{{ idx }}_product_id" id="item_{{ idx }}_product_id" class="form-select form-select-sm" data-idx="{{ idx }}" onchange="handleMobileProductChange({{ idx }})">
                             <option value="">{% translate "— Choisir un produit du catalogue —" %}</option>
                             {% for p in products %}
-                                <option value="{{ p.id }}" {% if item.matched_product and item.matched_product.id == p.id %}selected{% endif %}>
+                                <option value="{{ p.id }}" {% if item.matched_product_id == p.id %}selected{% endif %}>
                                     {{ p.name }} ({{ p.code }})
                                 </option>
                             {% endfor %}
@@ -384,9 +384,9 @@
                         </div>
                         <div class="col-12 mt-1">
                             <label class="form-label text-muted mb-0" style="font-size: 0.75rem;">{% translate "Emplacement de stockage" %}</label>
-                            <select name="item_{{ idx }}_location" class="form-select form-select-sm">
+                            <select name="item_{{ idx }}_location" id="item_{{ idx }}_location" class="form-select form-select-sm">
                                 {% for loc in locations %}
-                                    <option value="{{ loc.id }}" {% if default_location and default_location.id == loc.id %}selected{% endif %}>{{ loc.name }}</option>
+                                    <option value="{{ loc.id }}" {% if loc.id == item.suggested_location_id or not item.suggested_location_id and default_location and default_location.id == loc.id %}selected{% endif %}>{{ loc.name }}</option>
                                 {% endfor %}
                             </select>
                         </div>
@@ -419,6 +419,8 @@
 {% endif %}
 
 <script>
+const PRODUCT_LOCATIONS_MAP = {{ product_locations_json|default:'{}'|safe }};
+
 document.addEventListener('DOMContentLoaded', function() {
     // ── GESTION DE L'UPLOAD EN ÉTAPE 1 ──
     const dropZone = document.getElementById('drop-zone');
@@ -521,6 +523,14 @@ function handleMobileProductChange(idx) {
             label.className = 'badge bg-success-subtle text-success border border-success-subtle mb-1 w-100 text-start text-truncate';
             label.innerHTML = '<i class="bi bi-check-circle me-1"></i>{% translate "Associé à :" %} ' + selectedText;
         }
+
+        // Adapter automatiquement l'emplacement de destination au produit sélectionné
+        const pid = parseInt(select.value, 10);
+        const targetLocId = PRODUCT_LOCATIONS_MAP[pid];
+        const locSelect = document.getElementById('item_' + idx + '_location');
+        if (locSelect && targetLocId) {
+            locSelect.value = targetLocId;
+        }
     } else {
         if (card) card.classList.add('unassociated');
         if (label) {
diff --git a/loko/stock/templates/stock/purchase_order_from_pdf.html b/loko/stock/templates/stock/purchase_order_from_pdf.html
index 75bf927..19587fc 100644
--- a/loko/stock/templates/stock/purchase_order_from_pdf.html
+++ b/loko/stock/templates/stock/purchase_order_from_pdf.html
@@ -476,9 +476,9 @@
 
                                 <!-- Emplacement de stock -->
                                 <td>
-                                    <select name="item_{{ idx }}_location" class="form-select form-select-sm">
+                                    <select name="item_{{ idx }}_location" id="item_{{ idx }}_location" class="form-select form-select-sm">
                                         {% for loc in locations %}
-                                            <option value="{{ loc.id }}" {% if loc.id == default_location.id %}selected{% endif %}>
+                                            <option value="{{ loc.id }}" {% if loc.id == item.suggested_location_id or not item.suggested_location_id and loc.id == default_location.id %}selected{% endif %}>
                                                 {{ loc.name }} {% if loc.is_default %}(par défaut){% endif %}
                                             </option>
                                         {% empty %}
@@ -528,6 +528,8 @@
 </div>
 
 <script>
+const PRODUCT_LOCATIONS_MAP = {{ product_locations_json|default:'{}'|safe }};
+
 document.addEventListener('DOMContentLoaded', function() {
     // Zone drag & drop
     const dropZone = document.getElementById('drop-zone');
@@ -641,6 +643,14 @@ function handleProductSelection(idx) {
         select.classList.remove('is-invalid', 'border-warning');
         if (row) row.classList.remove('table-warning-subtle');
         if (help) help.classList.add('d-none');
+
+        // Adapter automatiquement l'emplacement de destination au produit sélectionné
+        const pid = parseInt(select.value, 10);
+        const targetLocId = PRODUCT_LOCATIONS_MAP[pid];
+        const locSelect = document.getElementById('item_' + idx + '_location');
+        if (locSelect && targetLocId) {
+            locSelect.value = targetLocId;
+        }
     } else {
         if (cb) cb.checked = false;
         select.classList.add('border-warning');
diff --git a/loko/stock/tests.py b/loko/stock/tests.py
index 3bf2e65..13824ba 100644
--- a/loko/stock/tests.py
+++ b/loko/stock/tests.py
@@ -2938,3 +2938,103 @@ class PurchaseOrderFromDocumentTests(TestCase):
         self.assertEqual(response.context["parse_result"]["image_count"], 2)
         self.assertEqual(len(response.context["saved_temp_files"]), 2)
 
+    def test_get_product_default_locations_map_and_model_method(self):
+        from .models import WarehouseLocation, Stock, get_product_default_locations_map
+
+        # loc1 est l'emplacement par défaut de l'entrepôt (self.location)
+        # Créer loc2 (non par défaut)
+        loc2 = WarehouseLocation.objects.create(
+            warehouse=self.warehouse,
+            name="Rayon B Étagère 2",
+            code="LOC-WH-DOC-2",
+            is_default=False,
+        )
+        # Créer loc3 (non par défaut)
+        loc3 = WarehouseLocation.objects.create(
+            warehouse=self.warehouse,
+            name="Rayon C Étagère 3",
+            code="LOC-WH-DOC-3",
+            is_default=False,
+        )
+
+        # Produit 1 : a un emplacement autorisé spécifique (loc2)
+        self.product.authorized_locations.add(loc2)
+        loc_map = get_product_default_locations_map(self.warehouse, [self.product.id])
+        self.assertEqual(loc_map[self.product.id], loc2.id)
+        self.assertEqual(self.product.get_default_location(self.warehouse), loc2)
+
+        # Produit 2 : sans emplacement autorisé mais avec du stock existant en loc3
+        from .models import Product
+        prod2 = Product.objects.create(
+            code="PROD-DOC-STOCK",
+            name="Forets SDS",
+            sku="SKU-DOC-SDS",
+        )
+        Stock.objects.create(product=prod2, location=loc3, quantity=40)
+        loc_map2 = get_product_default_locations_map(self.warehouse, [prod2.id])
+        self.assertEqual(loc_map2[prod2.id], loc3.id)
+        self.assertEqual(prod2.get_default_location(self.warehouse), loc3)
+
+        # Produit 3 : sans emplacement autorisé et sans stock -> fallback vers l'emplacement par défaut de l'entrepôt
+        prod3 = Product.objects.create(
+            code="PROD-DOC-NONE",
+            name="Scie Égoïne",
+            sku="SKU-DOC-SAW",
+        )
+        loc_map3 = get_product_default_locations_map(self.warehouse, [prod3.id])
+        self.assertEqual(loc_map3[prod3.id], self.location.id)
+        self.assertEqual(prod3.get_default_location(self.warehouse), self.location)
+
+    def test_view_parse_pdf_suggests_product_default_location(self):
+        from unittest.mock import patch
+        from django.core.files.uploadedfile import SimpleUploadedFile
+        from django.urls import reverse
+        from .models import WarehouseLocation
+
+        loc_specific = WarehouseLocation.objects.create(
+            warehouse=self.warehouse,
+            name="Zone Outillage Spécial",
+            code="LOC-SPECIFIC",
+            is_default=False,
+        )
+        self.product.authorized_locations.add(loc_specific)
+
+        self.client.force_login(self.superuser)
+        url = reverse("stock:purchase_order_from_pdf")
+        file1 = SimpleUploadedFile("devis.pdf", b"%PDF-1.4...", content_type="application/pdf")
+
+        mock_parse_result = {
+            'is_ocr': False,
+            'is_image': False,
+            'total_items': 1,
+            'metadata': {'supplier_name': 'Test Sup', 'quote_number': 'OF999'},
+            'matched_supplier': self.supplier,
+            'items': [{
+                'reference': 'ZE 45525',
+                'name': 'Mètre ruban',
+                'quantity': 3,
+                'unit': 'piece',
+                'raw_unit': 'Piece',
+                'gross_unit_price': 9.28,
+                'discount': '0%',
+                'unit_price': 9.28,
+                'total_amount': 27.84,
+                'vat_rate': 21.0,
+                'matched_product_id': self.product.id,
+                'matched_product_name': self.product.name,
+                'matched_product_code': self.product.code,
+            }],
+        }
+
+        with patch("stock.pdf_parser.PdfQuoteParser.parse", return_value=mock_parse_result):
+            response = self.client.post(url, {
+                "action": "parse_pdf",
+                "warehouse": self.warehouse.pk,
+                "pdf_file": [file1],
+            })
+
+        self.assertEqual(response.status_code, 200)
+        items = response.context["parse_result"]["items"]
+        self.assertEqual(items[0]["suggested_location_id"], loc_specific.id)
+        self.assertIn(f'value="{loc_specific.id}" selected', response.content.decode())
+
diff --git a/loko/stock/views.py b/loko/stock/views.py
index 9312fc5..b6031fb 100644
--- a/loko/stock/views.py
+++ b/loko/stock/views.py
@@ -1811,7 +1811,13 @@ def purchase_order_from_pdf(request):
                     location_id = request.POST.get(f'item_{i}_location')
                     location = WarehouseLocation.objects.filter(warehouse=warehouse, pk=location_id).first()
                     if not location:
-                        location = warehouse.locations.filter(is_default=True).first() or warehouse.locations.first()
+                        from .models import get_product_default_locations_map
+                        prod_locs = get_product_default_locations_map(warehouse, [product.id])
+                        def_loc_id = prod_locs.get(product.id)
+                        if def_loc_id:
+                            location = WarehouseLocation.objects.filter(warehouse=warehouse, pk=def_loc_id).first()
+                        if not location:
+                            location = warehouse.locations.filter(is_default=True).first() or warehouse.locations.first()
 
                     # Créer la ligne de commande
                     PurchaseOrderItem.objects.create(
@@ -1875,9 +1881,32 @@ def purchase_order_from_pdf(request):
 
     locations = []
     default_location = None
+    product_locations_map = {}
+    product_locations_json = "{}"
     if warehouse:
+        from .models import get_product_default_locations_map
         locations = warehouse.locations.all().order_by('name')
         default_location = warehouse.locations.filter(is_default=True).first() or locations.first()
+        product_locations_map = get_product_default_locations_map(warehouse)
+        product_locations_json = json.dumps(product_locations_map)
+
+        if parse_result and 'items' in parse_result:
+            for item in parse_result['items']:
+                matched_pid = item.get('matched_product_id')
+                if not matched_pid and item.get('matched_product'):
+                    matched_obj = item['matched_product']
+                    matched_pid = getattr(matched_obj, 'id', None)
+                    item['matched_product_id'] = matched_pid
+                    if 'matched_product_name' not in item:
+                        item['matched_product_name'] = getattr(matched_obj, 'name', '')
+                    if 'matched_product_code' not in item:
+                        item['matched_product_code'] = getattr(matched_obj, 'code', '')
+                if matched_pid and matched_pid in product_locations_map:
+                    item['suggested_location_id'] = product_locations_map[matched_pid]
+                elif default_location:
+                    item['suggested_location_id'] = default_location.id
+                else:
+                    item['suggested_location_id'] = None
 
     return render(request, 'stock/purchase_order_from_pdf.html', {
         'step': step,
@@ -1885,6 +1914,8 @@ def purchase_order_from_pdf(request):
         'selected_warehouse': warehouse,
         'locations': locations,
         'default_location': default_location,
+        'product_locations_map': product_locations_map,
+        'product_locations_json': product_locations_json,
         'suppliers': suppliers,
         'categories': categories,
         'products': products,