diff --git a/src/blackboard/operations.py b/src/blackboard/operations.py
index 7c7c966..885a4ee 100644
--- a/src/blackboard/operations.py
+++ b/src/blackboard/operations.py
@@ -173,7 +173,8 @@ class Blackboard:
             conn.close()
 
     def list_tasks(self, status: Optional[str] = None,
-                   assignee: Optional[str] = None) -> List[Task]:
+                   assignee: Optional[str] = None,
+                   card_id: Optional[str] = None) -> List[Task]:
         """列出任务"""
         conn = self._conn()
         try:
@@ -186,6 +187,9 @@ class Blackboard:
             if assignee:
                 conditions.append("assignee=?")
                 params.append(assignee)
+            if card_id:
+                conditions.append("card_id=?")
+                params.append(card_id)
             if conditions:
                 query += " WHERE " + " AND ".join(conditions)
             query += " ORDER BY priority ASC, created_at ASC"