diff --git a/DBHelper/MongoHelper.py b/DBHelper/MongoHelper.py
index 33c661b..fe8739e 100644
--- a/DBHelper/MongoHelper.py
+++ b/DBHelper/MongoHelper.py
@@ -258,6 +258,19 @@ class MongoHelper:
         collection.delete_one(param3)
         return True
 
+    def delete_single_data_in_array(self, param1, param2, param3, param4):
+        """
+        删除数组中的单条数据
+        param1: str 数据库
+        param2: str 数据表
+        param3: dict 一级字段查询条件
+        param4: dict 二级字段查询条件
+        return: None
+        """
+        collection = self.client[param1][param2]
+        collection.update_one(param3, {"$pull": param4})
+        return True
+
     def find_file(self, param1, param2, param3):
         """
         读取一个文件
diff --git a/DBHelper/test.py b/DBHelper/test.py
index ee747e0..0c08c85 100644
--- a/DBHelper/test.py
+++ b/DBHelper/test.py
@@ -1,17 +1,24 @@
 from DBHelper.MongoHelperInstance import DB_TEST
 
-DB_TEST.update_single_data_in_array(
-    "WR_DataBase_v2_test",
-    "C3.2_股东信息",
-    {"企业ID": "xzTtCERe"},
-    {"股东列表": {"股东名称": "A股股东"}},
-    {
-        "股东ID": 2390620707,
-        "股东名称": "A股股东",
-        "股东类型": "其他",
-        "股东性质": None,
-        "持股比例": "62.28%",
-        "认缴出资额": "181314.2855万人民币",
-        "认缴出资日期": "2016-09-30"
-    }
-)
+# DB_TEST.update_single_data_in_array(
+#     "WR_DataBase_v2_test",
+#     "C3.2_股东信息",
+#     {"企业ID": "xzTtCERe"},
+#     {"股东列表": {"股东名称": "A股股东"}},
+#     {
+#         "股东ID": 2390620707,
+#         "股东名称": "A股股东",
+#         "股东类型": "其他",
+#         "股东性质": None,
+#         "持股比例": "62.28%",
+#         "认缴出资额": "181314.2855万人民币",
+#         "认缴出资日期": "2016-09-30"
+#     }
+# )
+
+# DB_TEST.delete_single_data_in_array(
+#     "WR_DataBase_v2_test",
+#     "C3.2_股东信息",
+#     {"企业ID": "xzTtCERe"},
+#     {"股东列表": {"股东名称": "A股股东"}}
+# )