diff --git a/business/views.py b/business/views.py
index dd9a020..49ce2a6 100644
--- a/business/views.py
+++ b/business/views.py
@@ -1804,7 +1804,7 @@ class caseManagementDetail(APIView):
             Q_obj &= Q(party_name__icontains=party_name)
         if client_name:
             Q_obj &= Q(client_name__icontains=client_name)
-        # 按标签搜索：tags 可为字符串(名称模糊)或数组(标签ID如 [2,3])；tag_ids 为标签ID列表；满足任一标签即匹配
+        # 按标签搜索：tags 可为字符串(名称模糊)、数组(标签ID)、或 form 传来的字符串 "[2]"；tag_ids 为标签ID列表；满足任一标签即匹配
         tag_id_list = []
         if tags is not None and tags != '':
             if isinstance(tags, list):
@@ -1813,9 +1813,19 @@ class caseManagementDetail(APIView):
                 except (ValueError, TypeError):
                     pass
             elif isinstance(tags, str):
-                tag_id_list.extend(
-                    CaseTag.objects.filter(name__icontains=tags, is_deleted=False).values_list('id', flat=True)
-                )
+                tags_stripped = tags.strip()
+                # 前端 form-data 可能把 [2] 或 [2,3] 当成字符串传，先尝试按 JSON 数组解析
+                if tags_stripped.startswith('[') and tags_stripped.endswith(']'):
+                    try:
+                        parsed = json.loads(tags_stripped)
+                        if isinstance(parsed, list):
+                            tag_id_list.extend([int(x) for x in parsed if x is not None and str(x).strip() != ''])
+                    except (ValueError, TypeError, json.JSONDecodeError):
+                        pass
+                if not tag_id_list:
+                    tag_id_list.extend(
+                        CaseTag.objects.filter(name__icontains=tags, is_deleted=False).values_list('id', flat=True)
+                    )
         if tag_ids:
             try:
                 if isinstance(tag_ids, str):
@@ -2434,9 +2444,18 @@ class CaseDropdownList(APIView):
                 except (ValueError, TypeError):
                     pass
             elif isinstance(tags, str):
-                tag_id_list.extend(
-                    CaseTag.objects.filter(name__icontains=tags, is_deleted=False).values_list('id', flat=True)
-                )
+                tags_stripped = tags.strip()
+                if tags_stripped.startswith('[') and tags_stripped.endswith(']'):
+                    try:
+                        parsed = json.loads(tags_stripped)
+                        if isinstance(parsed, list):
+                            tag_id_list.extend([int(x) for x in parsed if x is not None and str(x).strip() != ''])
+                    except (ValueError, TypeError, json.JSONDecodeError):
+                        pass
+                if not tag_id_list:
+                    tag_id_list.extend(
+                        CaseTag.objects.filter(name__icontains=tags, is_deleted=False).values_list('id', flat=True)
+                    )
         if tag_ids:
             try:
                 if isinstance(tag_ids, str):