diff --git a/user_login_backend.py b/user_login_backend.py
new file mode 100644
index 0000000..f2daea2
--- /dev/null
+++ b/user_login_backend.py
@@ -0,0 +1,28 @@
+from django.contrib.auth import get_user_model
+from django.contrib.auth.backends import ModelBackend
+
+
+class EmailOrUsernameModelBackend(ModelBackend):
+    #lht: """
+    #lht: 允许使用用户名或邮箱登录
+    #lht: """
+
+    def authenticate(self, request, username=None, password=None, **kwargs):
+        #lht: 根据输入内容判断是邮箱还是用户名
+        if '@' in username:
+            kwargs = {'email': username}
+        else:
+            kwargs = {'username': username}
+        try:
+            user = get_user_model().objects.get(**kwargs)
+            if user.check_password(password):
+                return user
+        except get_user_model().DoesNotExist:
+            return None
+
+    def get_user(self, username):
+        #lht: 根据用户名获取用户对象
+        try:
+            return get_user_model().objects.get(pk=username)
+        except get_user_model().DoesNotExist:
+            return None