diff --git a/工具v2/database_tools.py b/工具v2/database_tools.py
index e0d5f83f..6de58c4d 100644
--- a/工具v2/database_tools.py
+++ b/工具v2/database_tools.py
@@ -1882,7 +1882,23 @@ def UnitRectoMetadataText(data): #把data中的单元对应变为metadata.txt中
             output += f"{units}\n\n"
     return output
     
+def gitdiff(commitid1,commitid2,fileinrepo="题库0.3/Problems.json",tempfilepath = "临时文件/temp.json"): # 根据两个git 的commit id 比较某一个json文件的不同, 返回一个tuple, 第一项是新增key的变化, 第二项是同一个key下哪些字段变化了
+    os.system(f"git show {commitid1}:{fileinrepo} > {tempfilepath}")
+    json1 = load_dict("临时文件/temp.json")
+    os.system(f"git show {commitid2}:{fileinrepo} > {tempfilepath}")
+    json2 = load_dict("临时文件/temp.json")
+    os.remove("临时文件/temp.json")
 
+    diff_list = []
+    new_or_deleted_list = [id for id in json1.keys() if not id in json2.keys()] + [id for id in json2.keys() if not id in json1.keys()]
+    for id in [i for i in json1.keys() if i in json2.keys()]:
+        current_diff = []
+        for field in json1[id]:
+            if not json1[id][field] == json2[id][field]:
+                current_diff.append(field)
+        if not current_diff == []:
+            diff_list.append((id,current_diff.copy()))
+    return (new_or_deleted_list,diff_list)
 
 if __name__ == "__main__":
     print("数据库工具, import用.")
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