diff --git a/main.py b/main.py
index 57e9998..fe76a97 100644
--- a/main.py
+++ b/main.py
@@ -304,7 +304,7 @@ def add_history(History_pd, row, promote):
     for rule in Rule_Level: 
         if row["入职时间"] < rule["start"]:
             History_pd.loc[len(History_pd),["变动后时间","变动原因"]] = [rule["start"], "工资调标"]
-    calctime = row["参加工作时间"]
+    calctime = row["入职时间"]
     while True:
         calctime += relativedelta(years=1) 
         if calctime > NOWTIME: