diff --git a/myblog/blog/admin.py b/myblog/blog/admin.py
index b5e8f60..940654e 100644
--- a/myblog/blog/admin.py
+++ b/myblog/blog/admin.py
@@ -1,5 +1,5 @@
 from django.contrib import admin
-from .models import Post, Category
+from .models import Post, Category, SiteSettings
 from django.db import models
 from mdeditor.widgets import MDEditorWidget
 
@@ -16,6 +16,15 @@ class PostAdmin(admin.ModelAdmin):
     search_fields = ('title', 'content')
 
 
+class SiteSettingsAdmin(admin.ModelAdmin):
+    list_display = ('summary_length',)
+    
+    def has_add_permission(self, request):
+        # 限制只能有一个站点设置实例
+        return not SiteSettings.objects.exists()
+
+
 # 注册自定义的PostAdmin
 admin.site.register(Post, PostAdmin)
-admin.site.register(Category)
\ No newline at end of file
+admin.site.register(Category)
+admin.site.register(SiteSettings, SiteSettingsAdmin)
\ No newline at end of file
diff --git a/myblog/blog/migrations/0008_sitesettings.py b/myblog/blog/migrations/0008_sitesettings.py
new file mode 100644
index 0000000..893ca5e
--- /dev/null
+++ b/myblog/blog/migrations/0008_sitesettings.py
@@ -0,0 +1,24 @@
+# Generated by Django 5.1 on 2025-07-27 15:27
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('blog', '0007_post_category'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='SiteSettings',
+            fields=[
+                ('id', models.BigAutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('summary_length', models.IntegerField(default=50, help_text='文章摘要字符长度')),
+            ],
+            options={
+                'verbose_name': '站点设置',
+                'verbose_name_plural': '站点设置',
+            },
+        ),
+    ]
diff --git a/myblog/blog/models.py b/myblog/blog/models.py
index 88ba4de..b1d15a5 100644
--- a/myblog/blog/models.py
+++ b/myblog/blog/models.py
@@ -19,6 +19,18 @@ class Category(models.Model):
         verbose_name_plural = "Categories"
 
 
+# 添加站点设置模型
+class SiteSettings(models.Model):
+    summary_length = models.IntegerField(default=50, help_text="文章摘要字符长度")
+    
+    class Meta:
+        verbose_name = "站点设置"
+        verbose_name_plural = "站点设置"
+    
+    def __str__(self):
+        return "站点设置"
+
+
 class Post(models.Model):
     title = models.CharField(max_length=100)
     content = MDTextField()  # ✅ 改成这里
diff --git a/myblog/blog/views.py b/myblog/blog/views.py
index 123f6bf..bb3c23d 100644
--- a/myblog/blog/views.py
+++ b/myblog/blog/views.py
@@ -1,5 +1,5 @@
 from django.shortcuts import render, get_object_or_404
-from .models import Post, Category
+from .models import Post, Category, SiteSettings
 
 
 # Create your views here.
@@ -17,6 +17,13 @@ def index(request):
     # 获取搜索类型参数
     search_type = request.GET.get('search_type', 'all')
     
+    # 获取站点设置，如果不存在则使用默认值
+    try:
+        site_settings = SiteSettings.objects.first()
+        summary_length = site_settings.summary_length if site_settings else 50
+    except SiteSettings.DoesNotExist:
+        summary_length = 50
+    
     # 根据分类和搜索关键词筛选文章
     if query:
         # 根据搜索类型执行不同的搜索
@@ -34,12 +41,12 @@ def index(request):
     
     posts = posts.order_by('-publish_date').distinct()
     
-    # 为每篇文章添加摘要（前50个字符）
+    # 为每篇文章添加摘要（根据设置的字符长度）
     for post in posts:
-        # 移除HTML标签并截取前50个字符作为摘要
+        # 移除HTML标签并截取前N个字符作为摘要
         import re
         clean_content = re.sub(r'<[^>]+>', '', post.get_markdown_content())
-        post.summary = clean_content[:50] + '...' if len(clean_content) > 50 else clean_content
+        post.summary = clean_content[:summary_length] + '...' if len(clean_content) > summary_length else clean_content
     
     return render(request, 'blog/index.html', {
         'posts': posts,