diff --git a/apps/enm/services.py b/apps/enm/services.py
index 4d93dcf8..9656bb05 100644
--- a/apps/enm/services.py
+++ b/apps/enm/services.py
@@ -46,14 +46,13 @@ def transfer_mpoint_val_to_ep_running_state(current_val, base_val: float, expr_s
         matches = re.findall(pattern, expr_str)
         for match in matches:
             if match == "self":
-                expr_str = expr_str.replace(f"${{{match}}}", str(current_val))
+                expr_str = expr_str.replace("{self}", str(current_val))
             else:
+                match_val = 50
                 mpoint_data = MpointCache(match).data
-                if mpoint_data:
-                    match_val = 50
-                    if mpoint_data.get("gather_state", -2) == 0:  # 测点正常采集
-                        match_val = mpoint_data["last_data"]["last_mrs"]
-                    expr_str = expr_str.replace(f"{{{match}}}", str(match_val))
+                if mpoint_data and mpoint_data.get("gather_state", -2) == 0:  # 测点正常采集
+                    match_val = mpoint_data["last_data"]["last_mrs"]
+                expr_str = expr_str.replace(f"{{{match}}}", str(match_val))
         rval = eval(expr_str)
         return rval
     if isinstance(current_val, bool):