diff --git a/backend/app/routers/collections.py b/backend/app/routers/collections.py
index 4df0b5c..983ba1c 100644
--- a/backend/app/routers/collections.py
+++ b/backend/app/routers/collections.py
@@ -304,6 +304,34 @@ def get_stats(
     }
 
 
+@router.get("/by-user/{user_id}")
+def get_collections_by_user(
+    user_id: str,
+    current_user: User = Depends(get_current_user),
+    db: Session = Depends(get_db)
+):
+    """获取指定用户的所有藏品（管理员专用）"""
+    if current_user.role != "admin":
+        raise HTTPException(status_code=403, detail="E00050: 仅管理员可访问")
+    
+    collections = db.query(Collection).filter(
+        Collection.f99_91_user_id == user_id
+    ).all()
+    
+    result = []
+    for c in collections:
+        result.append({
+            "f99_90_id": c.f99_90_id,
+            "f01_01_name": c.f01_01_name,
+            "f02_10_prefix_serial": c.f02_10_prefix_serial,
+            "f02_11_version": c.f02_11_version,
+            "f01_04_status": c.f01_04_status,
+            "f05_40_cost_price": c.f05_40_cost_price,
+            "f99_92_created_at": c.f99_92_created_at.isoformat() if c.f99_92_created_at else None
+        })
+    
+    return result
+
 @router.get("/{collection_id}")
 def get_collection(
     collection_id: str,