diff --git a/app/api/checkpoint.py b/app/api/checkpoint.py
index 8b2f938..30e322f 100644
--- a/app/api/checkpoint.py
+++ b/app/api/checkpoint.py
@@ -35,7 +35,21 @@ async def get_point_ids_by_linecode(
     checkpoint_service = CheckpointService()
 
     try:
-        point_ids,point_id_dict = checkpoint_service.get_point_ids_by_linecode(db, request.linecode)
+        print( f"Fetching point IDs for linecode: {request.linecode}" )
+        point_ids, point_id_dict = checkpoint_service.get_point_ids_by_linecode(db, request.linecode)
+
+        # 检查结果是否为空
+        if not point_ids or len(point_ids) == 0:
+            return {
+                "code": 0,
+                "message": f"未找到线路编码 '{request.linecode}' 对应的观测点数据",
+                "data": {
+                    "linecode": request.linecode,
+                    "point_ids": [],
+                    "point_id_dict": {},
+                    "count": 0
+                }
+            }
 
         return {
             "code": 0,
@@ -48,4 +62,13 @@ async def get_point_ids_by_linecode(
             }
         }
     except Exception as e:
-        raise HTTPException(status_code=500, detail=f"查询失败: {str(e)}")
+        return {
+            "code": 500,
+            "message": f"查询失败: {str(e)}",
+            "data": {
+                "linecode": request.linecode,
+                "point_ids": [],
+                "point_id_dict": {},
+                "count": 0
+            }
+        }
diff --git a/app/services/checkpoint.py b/app/services/checkpoint.py
index 947df22..6bb45f1 100644
--- a/app/services/checkpoint.py
+++ b/app/services/checkpoint.py
@@ -241,17 +241,22 @@ class CheckpointService(BaseService[Checkpoint]):
         from ..models.settlement_data import SettlementData
 
         # 1. 根据linecode查询水准数据表，获取所有NYID（去重）
+        print(linecode)
         nyid_query = db.query(LevelData.NYID).filter(LevelData.linecode == linecode).distinct()
-        nyid_list = [result.NYID for result in nyid_query.all() if result.NYID]
+        nyid_list = nyid_query.all()
 
-        if not nyid_list:
-            return []
-        print(nyid_list)
+        print("get_point_ids_by_linecode", nyid_list)
+
+        if not nyid_list or len(nyid_list) == 0:
+            return [], {}
+        print("nyid_list", nyid_list)
+        nyid_list = [result.NYID for result in nyid_list if result.NYID]
+        # print(nyid_list)
 
         max_nyid_str = max(nyid_list, key=int)
         nyid_list = []
         nyid_list.append(max_nyid_str)
-        print(nyid_list)
+        # print(nyid_list)
 
         # 2. 根据NYID列表查询沉降数据表，获取所有point_id（去重）
         point_id_query = db.query(
@@ -260,8 +265,13 @@ class CheckpointService(BaseService[Checkpoint]):
             SettlementData.NYID.in_(nyid_list)
         ).distinct()
 
+        # print(point_id_query)
         point_id_list = [f'{result.point_id}' for result in point_id_query.all() if result.point_id]
         # -{db.query(Checkpoint.aname).filter(Checkpoint.point_id == result.point_id).first().aname}
-        point_id_dict = {item :db.query(Checkpoint.aname).filter(Checkpoint.point_id == item).first().aname for item in point_id_list}
-
-        return point_id_list,point_id_dict
+        point_id_dict = {}
+        print(point_id_dict)
+        for item in point_id_list:
+            checkpoint = db.query(Checkpoint.aname).filter(Checkpoint.point_id == item).first()
+            point_id_dict[item] = checkpoint.aname if checkpoint else None
+        # print(f"111" ,point_id_dict)
+        return point_id_list, point_id_dict