改成这样就可以了： username = login_form.cleaned_data['username'] password = login_form.cleaned_data['password'] try: user = models.User.objects.get(username=username) if user.check_password(password): request.session['is_login'] = True request.session['user_id'] = user.id request.session['user_name'] = user.username return redirect('/index/') else: message = "密码不正确！" except Exception as e: message = "用户不存在: %s" % e