diff --git a/backend/community/admin.py b/backend/community/admin.py
index 1952105..ccf2896 100644
--- a/backend/community/admin.py
+++ b/backend/community/admin.py
@@ -202,16 +202,17 @@ class TopicAdmin(OrderableAdminMixin, ModelAdmin):
     inlines = [TopicMediaInline, ReplyInline]
     actions = ['reset_ordering']
 
-    @admin.action(description="重置排序 (按发布时间倒序)")
+    @admin.action(description="重置排序 (0,1,2... 新帖子在前)")
     def reset_ordering(self, request, queryset):
         """
-        将所有帖子按时间倒序重新分配order值（order = -id）
+        将所有帖子按时间倒序重新分配order值 (0, 1, 2, ...)
         """
-        all_objects = Topic.objects.all().order_by('-id')
-        for obj in all_objects:
-            obj.order = -obj.id
-            obj.save(update_fields=['order'])
-        self.message_user(request, f"成功重置了 {all_objects.count()} 个帖子的排序权重（新帖子在前）。")
+        all_objects = Topic.objects.all().order_by('-created_at')
+        for index, obj in enumerate(all_objects):
+            if obj.order != index:
+                obj.order = index
+                obj.save(update_fields=['order'])
+        self.message_user(request, f"成功重置了 {all_objects.count()} 个帖子的排序权重（从0开始）。")
     
     fieldsets = (
         ('帖子内容', {
diff --git a/backend/community/models.py b/backend/community/models.py
index b2cc2af..4400985 100644
--- a/backend/community/models.py
+++ b/backend/community/models.py
@@ -142,12 +142,19 @@ class Topic(models.Model):
     order = models.IntegerField(default=0, verbose_name="排序")
 
     def save(self, *args, **kwargs):
+        # 记录是否为新对象，因为super().save后pk就有了
         is_new = self.pk is None
+        
+        # 第一次保存，先入库
         super().save(*args, **kwargs)
+        
+        # 如果是新创建，且 order 默认为 0（未指定）
         if is_new and getattr(self, 'order', 0) == 0:
-            # 默认使用 -id 作为排序值，确保新帖子默认排在前面（order越小越靠前）
-            Topic.objects.filter(pk=self.pk).update(order=-self.pk)
-            self.order = -self.pk
+            # 将所有其他帖子的 order + 1，腾出 0 的位置
+            Topic.objects.exclude(pk=self.pk).filter(order__gte=0).update(order=models.F('order') + 1)
+            # 确保自己是 0
+            Topic.objects.filter(pk=self.pk).update(order=0)
+            self.order = 0
 
     def __str__(self):
         return self.title
diff --git a/backend/community/views.py b/backend/community/views.py
index 879a7c8..24fbdc1 100644
--- a/backend/community/views.py
+++ b/backend/community/views.py
@@ -259,8 +259,8 @@ class TopicViewSet(viewsets.ModelViewSet):
     filter_backends = [filters.SearchFilter, filters.OrderingFilter, DjangoFilterBackend]
     search_fields = ['title', 'content']
     filterset_fields = ['category', 'is_pinned']
-    ordering_fields = ['created_at', 'view_count']
-    ordering = ['-is_pinned', '-created_at']
+    ordering_fields = ['created_at', 'view_count', 'order']
+    ordering = ['order', '-is_pinned', '-created_at']
 
     def perform_create(self, serializer):
         user = get_current_wechat_user(self.request)
diff --git a/backend/config/settings.py b/backend/config/settings.py
index 954dc43..664f04c 100644
--- a/backend/config/settings.py
+++ b/backend/config/settings.py
@@ -101,19 +101,7 @@ DATABASES = {
 
 #从环境变量获取数据库配置 (Docker 环境会自动注入这些变量。
 
-DB_HOST = os.environ.get('DB_HOST', '6.6.6.66')
-if DB_HOST:
-    DATABASES['default'] = {
-        'ENGINE': 'django.db.backends.postgresql',
-        'NAME': os.environ.get('DB_NAME', 'market'),
-        'USER': os.environ.get('DB_USER', 'market'),
-        'PASSWORD': os.environ.get('DB_PASSWORD', '123market'),
-        'HOST': DB_HOST,
-        'PORT': os.environ.get('DB_PORT', '5432'),
-    }
-
-
-# DB_HOST = os.environ.get('DB_HOST', '121.43.104.161')
+# DB_HOST = os.environ.get('DB_HOST', '6.6.6.66')
 # if DB_HOST:
 #     DATABASES['default'] = {
 #         'ENGINE': 'django.db.backends.postgresql',
@@ -121,10 +109,22 @@ if DB_HOST:
 #         'USER': os.environ.get('DB_USER', 'market'),
 #         'PASSWORD': os.environ.get('DB_PASSWORD', '123market'),
 #         'HOST': DB_HOST,
-#         'PORT': os.environ.get('DB_PORT', '6433'),
+#         'PORT': os.environ.get('DB_PORT', '5432'),
 #     }
 
 
+DB_HOST = os.environ.get('DB_HOST', '121.43.104.161')
+if DB_HOST:
+    DATABASES['default'] = {
+        'ENGINE': 'django.db.backends.postgresql',
+        'NAME': os.environ.get('DB_NAME', 'market'),
+        'USER': os.environ.get('DB_USER', 'market'),
+        'PASSWORD': os.environ.get('DB_PASSWORD', '123market'),
+        'HOST': DB_HOST,
+        'PORT': os.environ.get('DB_PORT', '6433'),
+    }
+
+
 # Password validation
 # https://docs.djangoproject.com/en/6.0/ref/settings/#auth-password-validators