diff --git a/src/user_manager.py b/src/user_manager.py
new file mode 100644
index 0000000..7aede43
--- /dev/null
+++ b/src/user_manager.py
@@ -0,0 +1,64 @@
+# user_manager.py
+from enum import Enum, auto
+
+
+class AccountType(Enum):
+    """账户类型枚举类，对应小学、初中、高中三个级别"""
+    PRIMARY_SCHOOL = auto()
+    MIDDLE_SCHOOL = auto()
+    HIGH_SCHOOL = auto()
+    INVALID = auto()
+
+
+class UserManager:
+    def __init__(self):
+        # 初始化预设账户：key为用户名，value为(密码, 账户类型)
+        self.user_database = {
+            # 小学账户
+            "张三 1": ("123", AccountType.PRIMARY_SCHOOL),
+            "张三 2": ("123", AccountType.PRIMARY_SCHOOL),
+            "张三 3": ("123", AccountType.PRIMARY_SCHOOL),
+            # 初中账户
+            "李四 1": ("123", AccountType.MIDDLE_SCHOOL),
+            "李四 2": ("123", AccountType.MIDDLE_SCHOOL),
+            "李四 3": ("123", AccountType.MIDDLE_SCHOOL),
+            # 高中账户
+            "王五 1": ("123", AccountType.HIGH_SCHOOL),
+            "王五 2": ("123", AccountType.HIGH_SCHOOL),
+            "王五 3": ("123", AccountType.HIGH_SCHOOL),
+        }
+
+    def verify_user(self, username: str, password: str) -> AccountType:
+        """
+        验证用户名和密码是否正确
+        :param username: 输入的用户名
+        :param password: 输入的密码
+        :return: 账户类型，无效账户返回INVALID
+        """
+        user_info = self.user_database.get(username)
+        if user_info and user_info[0] == password:
+            return user_info[1]
+        return AccountType.INVALID
+
+    def type_to_str(self, account_type: AccountType) -> str:
+        """将账户类型转换为中文描述"""
+        type_map = {
+            AccountType.PRIMARY_SCHOOL: "小学",
+            AccountType.MIDDLE_SCHOOL: "初中",
+            AccountType.HIGH_SCHOOL: "高中",
+            AccountType.INVALID: "未知"
+        }
+        return type_map[account_type]
+
+    def parse_type_choice(self, choice: int) -> AccountType:
+        """
+        根据输入的序号解析对应的账户类型
+        :param choice: 输入的序号（1代表小学，2代表初中，3代表高中）
+        :return: 对应的账户类型，无效输入返回INVALID
+        """
+        choice_map = {
+            1: AccountType.PRIMARY_SCHOOL,
+            2: AccountType.MIDDLE_SCHOOL,
+            3: AccountType.HIGH_SCHOOL
+        }
+        return choice_map.get(choice, AccountType.INVALID)
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