diff --git a/server/HoneyBox/src/HoneyBox.Admin.Business/Controllers/ConfigController.cs b/server/HoneyBox/src/HoneyBox.Admin.Business/Controllers/ConfigController.cs
index fcb8fee0..48500a62 100644
--- a/server/HoneyBox/src/HoneyBox.Admin.Business/Controllers/ConfigController.cs
+++ b/server/HoneyBox/src/HoneyBox.Admin.Business/Controllers/ConfigController.cs
@@ -149,4 +149,23 @@ public class ConfigController : BusinessControllerBase
     {
         return Ok(ConfigKeys.AllKeys);
     }
+
+    /// <summary>
+    /// 清除所有用户海报缓存
+    /// </summary>
+    /// <returns>清除结果</returns>
+    [HttpDelete("poster-cache")]
+    [BusinessPermission("config:edit")]
+    public async Task<IActionResult> ClearAllPosterCache()
+    {
+        try
+        {
+            var count = await _configService.ClearAllPosterCacheAsync();
+            return Ok(new { message = $"成功清除 {count} 条海报缓存", count });
+        }
+        catch (Exception)
+        {
+            return Error(BusinessErrorCodes.InternalError, "清除海报缓存失败");
+        }
+    }
 }
diff --git a/server/HoneyBox/src/HoneyBox.Admin.Business/Services/AdminConfigService.cs b/server/HoneyBox/src/HoneyBox.Admin.Business/Services/AdminConfigService.cs
index 135c5c6e..f34cd584 100644
--- a/server/HoneyBox/src/HoneyBox.Admin.Business/Services/AdminConfigService.cs
+++ b/server/HoneyBox/src/HoneyBox.Admin.Business/Services/AdminConfigService.cs
@@ -189,6 +189,23 @@ public class AdminConfigService : IAdminConfigService
         }
     }
 
+    /// <inheritdoc />
+    public async Task<int> ClearAllPosterCacheAsync()
+    {
+        try
+        {
+            // 删除所有海报缓存记录
+            var count = await _dbContext.Database.ExecuteSqlRawAsync("DELETE FROM user_poster_cache");
+            _logger.LogInformation("Cleared {Count} poster cache records", count);
+            return count;
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "Failed to clear poster cache");
+            throw;
+        }
+    }
+
     #region Private Validation Methods
 
     /// <summary>
diff --git a/server/HoneyBox/src/HoneyBox.Admin.Business/Services/Interfaces/IAdminConfigService.cs b/server/HoneyBox/src/HoneyBox.Admin.Business/Services/Interfaces/IAdminConfigService.cs
index 98e08792..c2202266 100644
--- a/server/HoneyBox/src/HoneyBox.Admin.Business/Services/Interfaces/IAdminConfigService.cs
+++ b/server/HoneyBox/src/HoneyBox.Admin.Business/Services/Interfaces/IAdminConfigService.cs
@@ -52,4 +52,10 @@ public interface IAdminConfigService
     /// </summary>
     /// <param name="key">配置键</param>
     Task ClearConfigCacheAsync(string key);
+
+    /// <summary>
+    /// 清除所有用户海报缓存
+    /// </summary>
+    /// <returns>清除的记录数</returns>
+    Task<int> ClearAllPosterCacheAsync();
 }
diff --git a/server/HoneyBox/src/HoneyBox.Admin/admin-web/src/api/business/config.ts b/server/HoneyBox/src/HoneyBox.Admin/admin-web/src/api/business/config.ts
index 02ed6ff0..ae24dae2 100644
--- a/server/HoneyBox/src/HoneyBox.Admin/admin-web/src/api/business/config.ts
+++ b/server/HoneyBox/src/HoneyBox.Admin/admin-web/src/api/business/config.ts
@@ -708,3 +708,22 @@ export function getRankSettingSetting(): Promise<ApiResponse<ConfigResponse<Rank
 export function updateRankSettingSetting(value: RankSettingSetting): Promise<ApiResponse<string>> {
   return updateConfig('rank_setting', value)
 }
+
+// ==================== 海报缓存管理 ====================
+
+/** 清除海报缓存响应 */
+export interface ClearPosterCacheResponse {
+  message: string
+  count: number
+}
+
+/**
+ * 清除所有用户海报缓存
+ * @returns 清除结果
+ */
+export function clearPosterCache(): Promise<ApiResponse<ClearPosterCacheResponse>> {
+  return request({
+    url: `${CONFIG_BASE_URL}/poster-cache`,
+    method: 'delete'
+  })
+}
diff --git a/server/HoneyBox/src/HoneyBox.Admin/admin-web/src/views/business/config/base.vue b/server/HoneyBox/src/HoneyBox.Admin/admin-web/src/views/business/config/base.vue
index 1ffe8e83..aeeee407 100644
--- a/server/HoneyBox/src/HoneyBox.Admin/admin-web/src/views/business/config/base.vue
+++ b/server/HoneyBox/src/HoneyBox.Admin/admin-web/src/views/business/config/base.vue
@@ -266,7 +266,7 @@
         </el-row>
 
         <el-row :gutter="24">
-          <el-col :span="8">
+          <el-col :span="6">
             <el-form-item label="二维码X坐标" prop="poster_qr_x">
               <el-input-number
                 v-model.number="formData.poster_qr_x"
@@ -278,7 +278,7 @@
               <div class="form-tip">二维码在海报上的X坐标（像素）</div>
             </el-form-item>
           </el-col>
-          <el-col :span="8">
+          <el-col :span="6">
             <el-form-item label="二维码Y坐标" prop="poster_qr_y">
               <el-input-number
                 v-model.number="formData.poster_qr_y"
@@ -290,7 +290,7 @@
               <div class="form-tip">二维码在海报上的Y坐标（像素）</div>
             </el-form-item>
           </el-col>
-          <el-col :span="8">
+          <el-col :span="6">
             <el-form-item label="二维码大小" prop="poster_qr_size">
               <el-input-number
                 v-model.number="formData.poster_qr_size"
@@ -302,6 +302,14 @@
               <div class="form-tip">二维码宽高（像素）</div>
             </el-form-item>
           </el-col>
+          <el-col :span="6">
+            <el-form-item label="清除海报缓存">
+              <el-button type="danger" :loading="clearingCache" @click="handleClearPosterCache">
+                <el-icon><Delete /></el-icon>清除所有缓存
+              </el-button>
+              <div class="form-tip">修改海报配置后需清除缓存才能生效</div>
+            </el-form-item>
+          </el-col>
         </el-row>
 
         <!-- 开关配置 -->
@@ -340,14 +348,15 @@
 
 <script setup lang="ts">
 import { ref, reactive, onMounted } from 'vue'
-import { ElMessage, type FormInstance, type FormRules } from 'element-plus'
-import { Check } from '@element-plus/icons-vue'
+import { ElMessage, ElMessageBox, type FormInstance, type FormRules } from 'element-plus'
+import { Check, Delete } from '@element-plus/icons-vue'
 import ImageUpload from '@/components/ImageUpload/index.vue'
-import { getBaseSetting, updateBaseSetting, type BaseSetting } from '@/api/business/config'
+import { getBaseSetting, updateBaseSetting, clearPosterCache, type BaseSetting } from '@/api/business/config'
 
 // 加载状态
 const loading = ref(false)
 const saving = ref(false)
+const clearingCache = ref(false)
 
 // 表单引用
 const formRef = ref<FormInstance>()
@@ -521,6 +530,34 @@ const handleSave = async () => {
 onMounted(() => {
   loadData()
 })
+
+// 清除海报缓存
+const handleClearPosterCache = async () => {
+  try {
+    await ElMessageBox.confirm(
+      '确定要清除所有用户的海报缓存吗？清除后用户下次访问推广页面时会重新生成海报。',
+      '确认清除',
+      {
+        confirmButtonText: '确定',
+        cancelButtonText: '取消',
+        type: 'warning'
+      }
+    )
+  } catch {
+    return
+  }
+
+  clearingCache.value = true
+  try {
+    const res = await clearPosterCache()
+    ElMessage.success(res.data?.message || '清除成功')
+  } catch (error) {
+    ElMessage.error('清除失败')
+    console.error('清除海报缓存失败:', error)
+  } finally {
+    clearingCache.value = false
+  }
+}
 </script>
 
 <style scoped>