diff --git a/cwd-admin/src/views/StatsView.vue b/cwd-admin/src/views/StatsView.vue
index f7ccfbe..2af4f94 100644
--- a/cwd-admin/src/views/StatsView.vue
+++ b/cwd-admin/src/views/StatsView.vue
@@ -40,7 +40,7 @@
     </div>
 
     <div class="card">
-      <h3 class="card-title">最近 7 天评论数趋势</h3>
+      <h3 class="card-title">最近 30 天评论数趋势</h3>
       <div v-if="statsLoading" class="page-hint">加载中...</div>
       <div v-else-if="statsError" class="page-error">{{ statsError }}</div>
       <div v-else class="chart-wrapper">
diff --git a/cwd-api/src/api/admin/getStats.ts b/cwd-api/src/api/admin/getStats.ts
index 9cc3bbe..6ff6f2c 100644
--- a/cwd-api/src/api/admin/getStats.ts
+++ b/cwd-api/src/api/admin/getStats.ts
@@ -94,12 +94,12 @@ export const getStats = async (c: Context<{ Bindings: Bindings }>) => {
 			.sort((a, b) => b.total - a.total);
 
 		const now = Date.now();
-		const sevenDaysAgo = now - 6 * 24 * 60 * 60 * 1000;
+		const thirtyDaysAgo = now - 29 * 24 * 60 * 60 * 1000;
 
 		const { results: dailyRows } = await c.env.CWD_DB.prepare(
 			"SELECT date(created / 1000, 'unixepoch') as day, COUNT(*) as total FROM Comment WHERE created >= ? GROUP BY day ORDER BY day ASC"
 		)
-			.bind(sevenDaysAgo)
+			.bind(thirtyDaysAgo)
 			.all<{ day: string; total: number }>();
 
 		const dailyMap = new Map<string, number>();
@@ -110,7 +110,7 @@ export const getStats = async (c: Context<{ Bindings: Bindings }>) => {
 		}
 
 		const last7Days: { date: string; total: number }[] = [];
-		for (let i = 6; i >= 0; i--) {
+		for (let i = 29; i >= 0; i--) {
 			const d = new Date(now - i * 24 * 60 * 60 * 1000);
 			const year = d.getUTCFullYear();
 			const month = String(d.getUTCMonth() + 1).padStart(2, '0');
diff --git a/docs/api/admin.md b/docs/api/admin.md
index ef23c4c..1735718 100644
--- a/docs/api/admin.md
+++ b/docs/api/admin.md
@@ -1085,7 +1085,7 @@ POST /admin/settings/email-test
 GET /admin/stats/comments
 ```
 
-用于管理后台「数据看板」展示评论整体统计、按域名统计以及最近 7 天评论趋势。
+用于管理后台「数据看板」展示评论整体统计、按域名统计以及最近 30 天评论趋势。
 
 - 方法：`GET`
 - 路径：`/admin/stats/comments`
@@ -1147,7 +1147,7 @@ GET /admin/stats/comments
 | `domains[].approved` | number              | 该域名下已通过评论数                  |
 | `domains[].pending`  | number              | 该域名下待审核评论数                  |
 | `domains[].rejected` | number              | 该域名下已拒绝评论数                  |
-| `last7Days`          | Array\<DailyStat\>  | 最近 7 天的每日评论数（按自然日聚合） |
+| `last7Days`          | Array\<DailyStat\>  | 最近 30 天的每日评论数（按自然日聚合） |
 | `last7Days[].date`   | string (YYYY-MM-DD) | 日期，UTC 时间格式化后的自然日        |
 | `last7Days[].total`  | number              | 当日评论总数                          |