diff --git a/backend/community/admin.py b/backend/community/admin.py
index 8bafdd8..b9f85d3 100644
--- a/backend/community/admin.py
+++ b/backend/community/admin.py
@@ -30,14 +30,14 @@ class TopicMediaInline(TabularInline):
 
 @admin.register(Activity)
 class ActivityAdmin(ModelAdmin):
-    list_display = ('title', 'banner_display', 'start_time', 'location', 'signup_count', 'is_active', 'auto_confirm', 'created_at')
-    list_filter = ('is_active', 'auto_confirm', 'start_time')
+    list_display = ('title', 'banner_display', 'start_time', 'location', 'signup_count', 'is_visible', 'is_active', 'auto_confirm', 'created_at')
+    list_filter = ('is_visible', 'is_active', 'auto_confirm', 'start_time')
     search_fields = ('title', 'location')
     inlines = [ActivitySignupInline]
     
     fieldsets = (
         ('基本信息', {
-            'fields': ('title', 'description', 'banner', 'banner_url', 'is_active', 'auto_confirm')
+            'fields': ('title', 'description', 'banner', 'banner_url', 'is_visible', 'is_active', 'auto_confirm')
         }),
         ('费用与时间', {
             'fields': ('is_paid', 'price', 'start_time', 'end_time', 'location'),
diff --git a/backend/community/migrations/0012_activity_is_visible.py b/backend/community/migrations/0012_activity_is_visible.py
new file mode 100644
index 0000000..3ee4e9c
--- /dev/null
+++ b/backend/community/migrations/0012_activity_is_visible.py
@@ -0,0 +1,18 @@
+# Generated by Django 6.0.1 on 2026-02-23 09:33
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('community', '0011_activity_auto_confirm_alter_activitysignup_status'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='activity',
+            name='is_visible',
+            field=models.BooleanField(default=True, help_text='关闭后将不在前端列表页显示', verbose_name='是否显示'),
+        ),
+    ]
diff --git a/backend/community/models.py b/backend/community/models.py
index 8c42676..2493cdc 100644
--- a/backend/community/models.py
+++ b/backend/community/models.py
@@ -19,6 +19,7 @@ class Activity(models.Model):
     price = models.DecimalField(max_digits=10, decimal_places=2, default=0, verbose_name="报名费用")
 
     is_active = models.BooleanField(default=True, verbose_name="是否启用")
+    is_visible = models.BooleanField(default=True, verbose_name="是否显示", help_text="关闭后将不在前端列表页显示")
     auto_confirm = models.BooleanField(default=False, verbose_name="无需审核", help_text="开启后，付费活动支付成功或免费活动报名后直接显示报名成功，不需要审核")
     
     # 常用报名信息开关
diff --git a/backend/community/views.py b/backend/community/views.py
index 931faad..2a7c914 100644
--- a/backend/community/views.py
+++ b/backend/community/views.py
@@ -19,7 +19,7 @@ class ActivityViewSet(viewsets.ReadOnlyModelViewSet):
     """
     社区活动接口
     """
-    queryset = Activity.objects.filter(is_active=True).order_by('-created_at')
+    queryset = Activity.objects.filter(is_active=True, is_visible=True).order_by('-created_at')
     serializer_class = ActivitySerializer
 
     def retrieve(self, request, *args, **kwargs):
@@ -198,6 +198,32 @@ class ActivityViewSet(viewsets.ReadOnlyModelViewSet):
             signup_info=signup_info,
             status=status_val
         )
+
+        # Send SMS for free activity signup (if confirmed)
+        if status_val == 'confirmed':
+             try:
+                from shop.sms_utils import notify_user_activity_signup_success
+                
+                # Mock an order object for the SMS template
+                # The template expects: customer_name, wechat_user, phone_number
+                class MockOrder:
+                    def __init__(self, user, signup_info):
+                        # Ensure we get the name and phone from signup_info first
+                        # signup_info keys might vary, let's try common ones
+                        self.customer_name = signup_info.get('name') or signup_info.get('username') or user.nickname or "用户"
+                        self.wechat_user = user
+                        self.phone_number = signup_info.get('phone') or signup_info.get('mobile') or user.phone_number or ""
+                
+                mock_order = MockOrder(user, signup_info)
+                
+                # Check if we have a valid phone number before sending
+                if mock_order.phone_number:
+                    notify_user_activity_signup_success(mock_order, signup)
+                else:
+                    print(f"Skipping SMS for signup {signup.id}: No phone number found")
+             except Exception as e:
+                print(f"发送免费活动报名短信失败: {str(e)}")
+
         serializer = ActivitySignupSerializer(signup)
         return Response(serializer.data, status=201)
 
diff --git a/backend/shop/sms_utils.py b/backend/shop/sms_utils.py
index 60420a8..6c30664 100644
--- a/backend/shop/sms_utils.py
+++ b/backend/shop/sms_utils.py
@@ -123,6 +123,16 @@ def notify_user_activity_signup_success(order, signup):
     # 4. address
     address = signup.activity.location or "线上活动"
     
+    # 5. Handle phone number format (remove +86 or spaces if any)
+    phone_number = str(order.phone_number) if order.phone_number else ""
+    if phone_number:
+        phone_number = phone_number.replace("+86", "").replace(" ", "").strip()
+        
+    # Ensure phone number is valid (11 digits)
+    if not phone_number or len(phone_number) != 11 or not phone_number.isdigit():
+        print(f"无效的手机号: {phone_number}, 跳过短信发送")
+        return
+
     params = {
         "user_nick": user_nick or "用户",
         "unit_name": unit_name,
@@ -130,5 +140,5 @@ def notify_user_activity_signup_success(order, signup):
         "address": address
     }
     
-    print(f"准备发送活动报名成功通知: {order.phone_number}")
-    send_sms(order.phone_number, "SMS_501990528", params)
\ No newline at end of file
+    print(f"准备发送活动报名成功通知: {phone_number}")
+    send_sms(phone_number, "SMS_501990528", params)
\ No newline at end of file