diff --git a/工具v2/database_tools.py b/工具v2/database_tools.py
index 2a05e107..1e2b55d1 100644
--- a/工具v2/database_tools.py
+++ b/工具v2/database_tools.py
@@ -9,6 +9,11 @@ def ReadTextFile(filepath): #读取文本格式的文件
         data = f.read()
     return data #返回文本格式文件的内容
 
+def SaveTextFile(data,filepath): #写入文本格式的文件
+    with open(filepath,"w",encoding="u8") as f:
+        f.write(data)
+    return filepath #返回文件名
+
 def SortDict(adict): #按字典项顺序排序字典
     return dict(sorted(adict.items())) #返回排序后的字典
 
@@ -313,7 +318,14 @@ def SeperateFirstLine(string): # 切割一个含有换行的字符串
 def ObtainDatatoModify(metadatafilepath,fields_dict): #从metadata文件中获取需要修改的综合信息, metadata文件用双回车区分项, 单行的项表示此后的字段, 不小于两行的项中第一行是题目id, 第二行起是要修改的内容.
 #fieldsdictpath是字段信息数据库文件路径
     data = ReadTextFile(metadatafilepath)
-    data = re.sub(r"\n[\s\n]*\n","\n\n",data) #去除一些无意义的空格和多余的回车
+    datalines = data.split("\n")
+    data = ""
+    for l in datalines:
+        if l.strip() in fields_dict:
+            data += l + "\n\n"
+        else:
+            data += l + "\n"
+    data = re.sub(r"\n[\s\n]*\n","\n\n",data.strip()) #去除一些无意义的空格和多余的回车
     datalist = data.split("\n\n")
     to_modify_list = []
     currentfield = "NotAField"
@@ -406,6 +418,60 @@ def AppendObjData(prodict,objdict,field_id_and_content): #添加目标编号数
                 print("已于 %s 的 %s 字段执行添加, 编号为 %s, 内容为 %s"%(id,field,objid,objdict[objid]["content"])) 
     return (id,field,content) #返回三元组: 题号, 字段, 内容
 
+def AppendUsageData(prodict,field_id_and_content): #添加使用记录数据
+    field,id,content = field_id_and_content
+    lines = [re.sub(r"\s+",r"\t",line.strip()) for line in content.split("\n")]
+    pending_list = []
+    for line in lines:
+        if not "FORCE" in line.upper():
+            time_stripped = re.sub(r"^\d{4,}\t","",line) #读取去除时间的数据
+            if time_stripped in "\n".join(prodict[id][field]):
+                print("题号 %s 的 %s 字段, 内容 %s 已存在"%(id,field,line))
+            else:
+                classid = [info for info in line.split("\t") if len(re.findall(r"[班高一二三]",info))>0][0] # 读取班级号
+                if classid in "\n".join(prodict[id][field]):
+                    print("班级 %s 在题号为 %s 的题目处已有使用记录, 在pending list中记录"%(classid,id))
+                    oldinfo = [usage for usage in prodict[id][field] if classid in usage]
+                    pending_list = pending_list + [(id,line,oldinfo)]
+                else:
+                    prodict[id][field].append(line)
+                    print("已于 %s 的 %s 字段执行添加, 内容为 %s"%(id,field,line))
+        else:
+            line = re.sub(r"\s+",r"\t",re.sub(r"FORCE","",line.upper())).strip()
+            prodict[id][field].append(line)
+            print("已于 %s 的 %s 字段执行强制添加, 内容为 %s"%(id,field,line))
+    output = "usages\n\n"
+    for item in pending_list:
+        id,new,oldlist = item
+        output += id + "\n"
+        output += new+"\tFORCE\n"
+        output += "\n".join(oldlist)+"\n\n"
+    return (field,id,content,output) #返回四元组: 题号, 字段, 内容, 待确定是否要添加的字符串（不含FORCE字样的行为旧结果，含FORCE字样的行为新结果，FORCE是运行后强制添加）
+
+def ModifyMetadata(prodict,objdict,fieldsdict,metadatafilepath,pendingdatafilepath): #metadata自动修改, 根据字段自适应修改, 参数为题库字典, 目标字典, 字段字典, metadata文本文件路径, 待确定是否替换的内容的存放路径
+    data_to_modify = ObtainDatatoModify(metadatafilepath,fieldsdict)
+    for item in data_to_modify:
+        field = item[0]
+        if field == "NotAField":
+            print("字段名有误")
+            return 1
+        else:
+            method = fieldsdict[field]["Method"]
+            if method == "overwrite":
+                feedback = OverwriteData(prodict,fieldsdict,item)
+            elif method == "append":
+                feedback = AppendData(prodict,fieldsdict,item)
+            elif method == "mutualappend":
+                feedback = AppendMutualData(prodict,item)
+            elif method == "objappend":
+                feedback = AppendObjData(prodict,objdict,item)
+            elif method == "usageappend":
+                feedback = AppendUsageData(prodict,item)
+                outputstring = feedback[3]
+                SaveTextFile(outputstring,pendingdatafilepath)
+            elif method == "fixed":
+                print("字段 %s 不可按此方式修改"%field)
+    return feedback # 已在数据库中修改, 之后需要将数据库写入一次, 返回1表示字段名有误, 返回其他表示成功进行了修改
 
 if __name__ == "__main__":
     print("数据库工具, import用.")
\ No newline at end of file
diff --git a/工具v2/修改metadata.py b/工具v2/修改metadata.py
new file mode 100644
index 00000000..c02244fa
--- /dev/null
+++ b/工具v2/修改metadata.py
@@ -0,0 +1,17 @@
+metadatafilepath = "文本文件/metadata.txt"
+pendingdatafilepath = "临时文件/pendingmetadata.txt"
+
+
+
+
+
+
+from database_tools import *
+
+fieldsdict = load_dict("../题库0.3/ProblemFields.json")
+prodict = load_dict("../题库0.3/Problems.json")
+objdict = load_dict("../题库0.3/LessonObj.json")
+
+ModifyMetadata(prodict,objdict,fieldsdict,metadatafilepath,pendingdatafilepath)
+save_dict(prodict,"../题库0.3/Problem.json")
+
diff --git a/工具v2/文本文件/metadata.txt b/工具v2/文本文件/metadata.txt
new file mode 100644
index 00000000..0d158334
--- /dev/null
+++ b/工具v2/文本文件/metadata.txt
@@ -0,0 +1,50 @@
+usages
+
+000003
+20220825   2023届高三02班   0.909           0.758    
+20220825   2023届高三08班   0.929   0.818    
+20220825   2023届高三10班   0.963
+20220826    2023届高三11班  0.543   0.213
+
+ans
+1
+$2$
+
+2
+正好
+
+objs
+123
+K0102001B
+
+opp
+121
+23456
+
+
+id
+000008
+000009
+
+origin
+12345
+123456
+
+unrelated
+3
+4
+
+unrelated
+4
+3
+
+tags
+5
+哈哈
+六六
+
+usages
+
+000003
+20220825	2023届高三08班	0.929	0.818	FORCE
+20220824	2023届高三08班	0.939	0.818
\ No newline at end of file