diff --git a/src/routes/admin/system.js b/src/routes/admin/system.js
index 96afd6f5..01a20891 100644
--- a/src/routes/admin/system.js
+++ b/src/routes/admin/system.js
@@ -267,6 +267,7 @@ const defaultOemSettings = {
   publicStatsEnabled: false, // 是否在首页显示公开统计概览
   // 公开统计显示选项
   publicStatsShowModelDistribution: true, // 显示模型使用分布
+  publicStatsModelDistributionPeriod: 'today', // 模型使用分布时间范围: today, 24h, 7d, 30d, all
   publicStatsShowTokenTrends: false, // 显示Token使用趋势
   publicStatsShowApiKeysTrends: false, // 显示API Keys使用趋势
   publicStatsShowAccountTrends: false, // 显示账号使用趋势
@@ -319,6 +320,7 @@ router.put('/oem-settings', authenticateAdmin, async (req, res) => {
       showAdminButton,
       publicStatsEnabled,
       publicStatsShowModelDistribution,
+      publicStatsModelDistributionPeriod,
       publicStatsShowTokenTrends,
       publicStatsShowApiKeysTrends,
       publicStatsShowAccountTrends
@@ -349,6 +351,12 @@ router.put('/oem-settings', authenticateAdmin, async (req, res) => {
       }
     }
 
+    // 验证时间范围值
+    const validPeriods = ['today', '24h', '7d', '30d', 'all']
+    const periodValue = validPeriods.includes(publicStatsModelDistributionPeriod)
+      ? publicStatsModelDistributionPeriod
+      : 'today'
+
     const settings = {
       siteName: siteName.trim(),
       siteIcon: (siteIcon || '').trim(),
@@ -357,6 +365,7 @@ router.put('/oem-settings', authenticateAdmin, async (req, res) => {
       publicStatsEnabled: publicStatsEnabled === true, // 默认为false
       // 公开统计显示选项
       publicStatsShowModelDistribution: publicStatsShowModelDistribution !== false, // 默认为true
+      publicStatsModelDistributionPeriod: periodValue, // 时间范围
       publicStatsShowTokenTrends: publicStatsShowTokenTrends === true, // 默认为false
       publicStatsShowApiKeysTrends: publicStatsShowApiKeysTrends === true, // 默认为false
       publicStatsShowAccountTrends: publicStatsShowAccountTrends === true, // 默认为false
@@ -449,9 +458,15 @@ router.get('/public-stats', async (req, res) => {
     // 辅助函数：规范化布尔值
     const normalizeBoolean = (value) => value === true || value === 'true'
     const isRateLimitedFlag = (status) => {
-      if (!status) return false
-      if (typeof status === 'string') return status === 'limited'
-      if (typeof status === 'object') return status.isRateLimited === true
+      if (!status) {
+        return false
+      }
+      if (typeof status === 'string') {
+        return status === 'limited'
+      }
+      if (typeof status === 'object') {
+        return status.isRateLimited === true
+      }
       return false
     }
 
@@ -471,7 +486,7 @@ router.get('/public-stats', async (req, res) => {
       bedrockAccountService.getAllAccounts(),
       droidAccountService.getAllAccounts(),
       redis.getTodayStats(),
-      getPublicModelStats()
+      getPublicModelStats(settings.publicStatsModelDistributionPeriod || 'today')
     ])
 
     const bedrockAccounts = bedrockAccountsResult.success ? bedrockAccountsResult.data : []
@@ -568,7 +583,9 @@ router.get('/public-stats', async (req, res) => {
 
     // 根据设置添加可选数据
     if (settings.publicStatsShowModelDistribution !== false) {
-      publicStats.modelDistribution = modelStats
+      // modelStats 现在返回 { stats: [], period }
+      publicStats.modelDistribution = modelStats.stats
+      publicStats.modelDistributionPeriod = modelStats.period
     }
 
     // 获取趋势数据（最近7天）
@@ -605,20 +622,70 @@ router.get('/public-stats', async (req, res) => {
 })
 
 // 获取公开模型统计的辅助函数
-async function getPublicModelStats() {
+// period: 'today' | '24h' | '7d' | '30d' | 'all'
+async function getPublicModelStats(period = 'today') {
   try {
     const client = redis.getClientSafe()
     const today = redis.getDateStringInTimezone()
-    const pattern = `usage:model:daily:*:${today}`
-    const keys = await client.keys(pattern)
+    const tzDate = redis.getDateInTimezone()
 
-    if (keys.length === 0) {
-      return []
+    // 根据period生成日期范围
+    const getDatePatterns = () => {
+      const patterns = []
+
+      if (period === 'today') {
+        patterns.push(`usage:model:daily:*:${today}`)
+      } else if (period === '24h') {
+        // 过去24小时 = 今天 + 昨天
+        patterns.push(`usage:model:daily:*:${today}`)
+        const yesterday = new Date(tzDate)
+        yesterday.setDate(yesterday.getDate() - 1)
+        patterns.push(`usage:model:daily:*:${redis.getDateStringInTimezone(yesterday)}`)
+      } else if (period === '7d') {
+        // 过去7天
+        for (let i = 0; i < 7; i++) {
+          const date = new Date(tzDate)
+          date.setDate(date.getDate() - i)
+          patterns.push(`usage:model:daily:*:${redis.getDateStringInTimezone(date)}`)
+        }
+      } else if (period === '30d') {
+        // 过去30天
+        for (let i = 0; i < 30; i++) {
+          const date = new Date(tzDate)
+          date.setDate(date.getDate() - i)
+          patterns.push(`usage:model:daily:*:${redis.getDateStringInTimezone(date)}`)
+        }
+      } else if (period === 'all') {
+        // 所有数据
+        patterns.push('usage:model:daily:*')
+      } else {
+        // 默认今天
+        patterns.push(`usage:model:daily:*:${today}`)
+      }
+
+      return patterns
+    }
+
+    const patterns = getDatePatterns()
+    let allKeys = []
+
+    for (const pattern of patterns) {
+      const keys = await client.keys(pattern)
+      allKeys.push(...keys)
+    }
+
+    // 去重
+    allKeys = [...new Set(allKeys)]
+
+    if (allKeys.length === 0) {
+      return { stats: [], period }
     }
 
     // 模型名标准化
     const normalizeModelName = (model) => {
-      if (!model || model === 'unknown') return model
+      if (!model || model === 'unknown') {
+        return model
+      }
       if (model.includes('.anthropic.') || model.includes('.claude')) {
         let normalized = model.replace(/^[a-z0-9-]+\./, '')
         normalized = normalized.replace('anthropic.', '')
@@ -632,9 +699,11 @@ async function getPublicModelStats() {
     const modelStatsMap = new Map()
     let totalRequests = 0
 
-    for (const key of keys) {
+    for (const key of allKeys) {
       const match = key.match(/usage:model:daily:(.+):\d{4}-\d{2}-\d{2}$/)
-      if (!match) continue
+      if (!match) {
+        continue
+      }
 
       const rawModel = match[1]
       const normalizedModel = normalizeModelName(rawModel)
@@ -661,10 +730,10 @@ async function getPublicModelStats() {
 
     // 按占比排序，取前5个
     modelStats.sort((a, b) => b.percentage - a.percentage)
-    return modelStats.slice(0, 5)
+    return { stats: modelStats.slice(0, 5), period }
   } catch (error) {
     logger.warn('⚠️ Failed to get public model stats:', error.message)
-    return []
+    return { stats: [], period }
   }
 }
 
diff --git a/web/admin-spa/src/components/common/PublicStatsOverview.vue b/web/admin-spa/src/components/common/PublicStatsOverview.vue
index 6b069a81..5c630186 100644
--- a/web/admin-spa/src/components/common/PublicStatsOverview.vue
+++ b/web/admin-spa/src/components/common/PublicStatsOverview.vue
@@ -52,7 +52,12 @@
       "
       class="mt-4"
     >
-      <div class="section-title">模型使用分布</div>
+      <div class="section-title">
+        模型使用分布
+        <span class="period-label">{{
+          formatPeriodLabel(authStore.publicStats.modelDistributionPeriod)
+        }}</span>
+      </div>
       <div class="model-distribution">
         <div
           v-for="model in authStore.publicStats.modelDistribution"
@@ -384,6 +389,18 @@ function formatTokensShort(tokens) {
   return tokens.toString()
 }
 
+// 格式化时间范围标签
+function formatPeriodLabel(period) {
+  const labels = {
+    today: '今天',
+    '24h': '过去24小时',
+    '7d': '过去7天',
+    '30d': '过去30天',
+    all: '全部'
+  }
+  return labels[period] || labels['today']
+}
+
 // 获取平台图标
 function getPlatformIcon(platform) {
   const icons = {
@@ -450,6 +467,11 @@ function formatDateShort(dateStr) {
   @apply mb-2 text-center text-xs text-gray-600 dark:text-gray-400;
 }
 
+/* 时间范围标签 */
+.period-label {
+  @apply ml-1 rounded bg-gray-100 px-1.5 py-0.5 text-[10px] text-gray-500 dark:bg-gray-700 dark:text-gray-400;
+}
+
 /* 状态徽章 */
 .status-badge {
   @apply inline-flex items-center gap-1.5 rounded-full px-3 py-1 text-xs font-medium;
diff --git a/web/admin-spa/src/stores/settings.js b/web/admin-spa/src/stores/settings.js
index fb1f2d7b..468ca9bf 100644
--- a/web/admin-spa/src/stores/settings.js
+++ b/web/admin-spa/src/stores/settings.js
@@ -10,6 +10,11 @@ export const useSettingsStore = defineStore('settings', () => {
     siteIconData: '',
     showAdminButton: true, // 控制管理后台按钮的显示
     publicStatsEnabled: false, // 是否在首页显示公开统计概览
+    publicStatsShowModelDistribution: true,
+    publicStatsModelDistributionPeriod: 'today', // 时间范围: today, 24h, 7d, 30d, all
+    publicStatsShowTokenTrends: false,
+    publicStatsShowApiKeysTrends: false,
+    publicStatsShowAccountTrends: false,
     updatedAt: null
   })
 
diff --git a/web/admin-spa/src/views/SettingsView.vue b/web/admin-spa/src/views/SettingsView.vue
index 43d181e4..ce631fb2 100644
--- a/web/admin-spa/src/views/SettingsView.vue
+++ b/web/admin-spa/src/views/SettingsView.vue
@@ -1082,21 +1082,42 @@
                 选择要公开显示的数据：
               </p>
               <div class="grid gap-3 sm:grid-cols-2">
-                <label
-                  class="flex cursor-pointer items-center gap-3 rounded-lg border border-gray-200 bg-white p-3 transition-colors hover:bg-gray-50 dark:border-gray-600 dark:bg-gray-800 dark:hover:bg-gray-700"
+                <div
+                  class="rounded-lg border border-gray-200 bg-white p-3 transition-colors dark:border-gray-600 dark:bg-gray-800"
                 >
-                  <input
-                    v-model="oemSettings.publicStatsShowModelDistribution"
-                    class="h-4 w-4 rounded border-gray-300 text-green-600 focus:ring-green-500 dark:border-gray-600 dark:bg-gray-700"
-                    type="checkbox"
-                  />
-                  <div>
-                    <span class="text-sm font-medium text-gray-700 dark:text-gray-300"
-                      >模型使用分布</span
-                    >
-                    <p class="text-xs text-gray-500 dark:text-gray-400">显示各模型的使用占比</p>
+                  <label class="flex cursor-pointer items-center gap-3">
+                    <input
+                      v-model="oemSettings.publicStatsShowModelDistribution"
+                      class="h-4 w-4 rounded border-gray-300 text-green-600 focus:ring-green-500 dark:border-gray-600 dark:bg-gray-700"
+                      type="checkbox"
+                    />
+                    <div>
+                      <span class="text-sm font-medium text-gray-700 dark:text-gray-300"
+                        >模型使用分布</span
+                      >
+                      <p class="text-xs text-gray-500 dark:text-gray-400">显示各模型的使用占比</p>
+                    </div>
+                  </label>
+                  <div v-if="oemSettings.publicStatsShowModelDistribution" class="mt-3 pl-7">
+                    <div class="mb-1.5 text-xs text-gray-500 dark:text-gray-400">时间范围</div>
+                    <div class="inline-flex rounded-lg bg-gray-100 p-0.5 dark:bg-gray-700/50">
+                      <button
+                        v-for="option in modelDistributionPeriodOptions"
+                        :key="option.value"
+                        class="rounded-md px-2.5 py-1 text-xs font-medium transition-all"
+                        :class="
+                          oemSettings.publicStatsModelDistributionPeriod === option.value
+                            ? 'bg-white text-green-600 shadow-sm dark:bg-gray-600 dark:text-green-400'
+                            : 'text-gray-600 hover:text-gray-900 dark:text-gray-400 dark:hover:text-gray-200'
+                        "
+                        type="button"
+                        @click="oemSettings.publicStatsModelDistributionPeriod = option.value"
+                      >
+                        {{ option.label }}
+                      </button>
+                    </div>
                   </div>
-                </label>
+                </div>
                 <label
                   class="flex cursor-pointer items-center gap-3 rounded-lg border border-gray-200 bg-white p-3 transition-colors hover:bg-gray-50 dark:border-gray-600 dark:bg-gray-800 dark:hover:bg-gray-700"
                 >
@@ -1765,6 +1786,15 @@ defineOptions({
 const settingsStore = useSettingsStore()
 const { loading, saving, oemSettings } = storeToRefs(settingsStore)
 
+// 模型使用分布时间范围选项
+const modelDistributionPeriodOptions = [
+  { value: 'today', label: '今天' },
+  { value: '24h', label: '24小时' },
+  { value: '7d', label: '7天' },
+  { value: '30d', label: '30天' },
+  { value: 'all', label: '全部' }
+]
+
 // 组件refs
 const iconFileInput = ref()
 
@@ -2613,6 +2643,8 @@ const saveOemSettings = async () => {
       showAdminButton: oemSettings.value.showAdminButton,
       publicStatsEnabled: oemSettings.value.publicStatsEnabled,
       publicStatsShowModelDistribution: oemSettings.value.publicStatsShowModelDistribution,
+      publicStatsModelDistributionPeriod:
+        oemSettings.value.publicStatsModelDistributionPeriod || 'today',
       publicStatsShowTokenTrends: oemSettings.value.publicStatsShowTokenTrends,
       publicStatsShowApiKeysTrends: oemSettings.value.publicStatsShowApiKeysTrends,
       publicStatsShowAccountTrends: oemSettings.value.publicStatsShowAccountTrends