diff --git a/src/assets/js/toolbox-data.js b/src/assets/js/toolbox-data.js
index f64ae9a..43acd82 100644
--- a/src/assets/js/toolbox-data.js
+++ b/src/assets/js/toolbox-data.js
@@ -301,6 +301,17 @@ export const toolList = [
         enabled: true,
         changelogs: CHANGE_LOGS['keep-screen-on'],
       },
+      {
+        id: 'timer-tool',
+        component: 'Other/TimerTool',
+        title: '计时器',
+        iconClass: 'mdi mdi-timer-outline',
+        desc: '正计时、倒计时工具。',
+        createdAt: '2025-12-29',
+        updatedAt: '2025-12-29',
+        version: '1',
+        enabled: true,
+      },
       {
         id: 'open-new-window',
         component: 'Other/OpenNewWindow',
diff --git a/src/views/ToolboxView/Other/TimerTool.vue b/src/views/ToolboxView/Other/TimerTool.vue
new file mode 100644
index 0000000..2a4284d
--- /dev/null
+++ b/src/views/ToolboxView/Other/TimerTool.vue
@@ -0,0 +1,416 @@
+<template>
+  <div class="tool-detail-page">
+
+    <!-- 计时器显示 -->
+    <n-card size="small" title="计时器">
+      <div class="timer-display">
+        <span class="time-main">{{ formatTimeMain(data.timeDisplay) }}</span>
+        <span class="time-milliseconds">{{ formatTimeMilliseconds(data.timeDisplay) }}</span>
+      </div>
+    </n-card>
+
+    <!-- 控制按钮 -->
+    <n-card size="small" title="控制">
+      <n-flex justify="center" gap="12">
+        <n-button
+          type="success"
+          :disabled="data.isRunning"
+          @click="startTimer"
+        >开始</n-button>
+        <n-button
+          type="warning"
+          :disabled="!data.isRunning"
+          @click="pauseTimer"
+        >暂停</n-button>
+        <n-button
+          type="error"
+          @click="resetTimer"
+        >重置</n-button>
+        <n-button
+          type="primary"
+          @click="recordTime"
+        >记录</n-button>
+      </n-flex>
+    </n-card>
+
+    <!-- 设置 -->
+    <n-card size="small" title="设置">
+      <n-form
+        class="form-no-feedback"
+        label-align="left"
+        label-placement="top"
+        label-width="auto"
+      >
+        <!-- 计时模式 -->
+        <n-form-item label="计时模式">
+          <n-radio-group v-model:value="data.timerMode">
+            <n-radio-button label="正计时" :value="'countUp'" />
+            <n-radio-button label="倒计时" :value="'countDown'" />
+          </n-radio-group>
+        </n-form-item>
+
+        <!-- 倒计时时间设置 -->
+        <n-form-item label="倒计时设置" v-if="data.timerMode === 'countDown'">
+          <n-input-group>
+            <n-input-number
+              v-model:value="data.countDownTime.hours"
+              :min="0"
+              :max="99"
+              :precision="0"
+              :step="1"
+            ></n-input-number>
+            <span class="time-separator">时</span>
+            <n-input-number
+              v-model:value="data.countDownTime.minutes"
+              :min="0"
+              :max="59"
+              :precision="0"
+              :step="1"
+            ></n-input-number>
+            <span class="time-separator">分</span>
+            <n-input-number
+              v-model:value="data.countDownTime.seconds"
+              :min="0"
+              :max="59"
+              :precision="0"
+              :step="1"
+            ></n-input-number>
+            <span class="time-separator">秒</span>
+          </n-input-group>
+        </n-form-item>
+      </n-form>
+    </n-card>
+
+    <!-- 时间记录 -->
+    <n-card size="small" title="时间记录">
+      <div class="records-content">
+        <div
+          v-if="data.records.length === 0"
+          class="no-records"
+        >暂无记录</div>
+        <div
+          v-for="(record, index) in data.records"
+          :key="record.id"
+          class="record-item"
+        >
+          <span class="record-index">{{ index + 1 }}</span>
+          <span class="record-time">{{ formatTime(record.time) }}</span>
+          <span class="record-timestamp">{{ formatDateTime(record.timestamp) }}</span>
+        </div>
+      </div>
+      <n-button
+        type="error"
+        size="small"
+        class="clear-records-btn"
+        @click="clearRecords"
+      >清空记录</n-button>
+    </n-card>
+
+  </div>
+</template>
+
+<script setup>
+import {
+  NButton, NCard, NFlex, NForm, NFormItem, NInputGroup, NInputNumber, NRadioButton, NRadioGroup,
+} from 'naive-ui';
+
+import {
+  reactive, onBeforeUnmount, watch,
+} from 'vue';
+
+import {
+  getCommonDateTime,
+} from '@frost-utils/javascript/common/index';
+
+import {
+  $dialog, $notification,
+} from '@/assets/js/naive-ui';
+
+/** 数据 */
+const data = reactive({
+  /** 计时器模式：countUp（正计时）, countDown（倒计时） */
+  timerMode: 'countUp',
+  /** 是否正在运行 */
+  isRunning: false,
+  /** 当前显示时间（毫秒） */
+  timeDisplay: 0,
+  /** 倒计时时间设置 */
+  countDownTime: {
+    hours: 0,
+    minutes: 5,
+    seconds: 0
+  },
+  /** 计时器ID */
+  timerID: null,
+  /** 开始时间戳 */
+  startTime: 0,
+  /** 已运行时间 */
+  elapsedTime: 0,
+  /** 时间记录 */
+  records: [],
+  /** 记录ID */
+  recordID: 0,
+});
+
+/** 格式化时间显示（主时间部分：HH:MM:SS） */
+function formatTimeMain(milliseconds) {
+
+  let totalSeconds = Math.floor(milliseconds / 1000);
+  let hours = Math.floor(totalSeconds / 3600);
+  let minutes = Math.floor((totalSeconds % 3600) / 60);
+  let seconds = totalSeconds % 60;
+
+  return `${hours.toString().padStart(2, '0')}:${minutes.toString().padStart(2, '0')}:${seconds.toString().padStart(2, '0')}`;
+
+}
+
+/** 格式化时间显示（毫秒部分：.SSS） */
+function formatTimeMilliseconds(milliseconds) {
+  let ms = milliseconds % 1000;
+  return `.${ms.toString().padStart(3, '0')}`;
+}
+
+/** 格式化完整时间显示（用于记录和提示） */
+function formatTime(milliseconds) {
+  return `${formatTimeMain(milliseconds)}${formatTimeMilliseconds(milliseconds)}`;
+}
+
+/** 格式化日期时间 */
+function formatDateTime(timestamp) {
+  return getCommonDateTime(timestamp);
+}
+
+/** 开始计时器 */
+function startTimer() {
+
+  if (data.timerMode === 'countUp') {
+
+    // 正计时模式
+    data.startTime = Date.now() - data.elapsedTime;
+    data.timerID = setInterval(() => {
+      data.elapsedTime = Date.now() - data.startTime;
+      data.timeDisplay = data.elapsedTime;
+    }, 10); // 每10毫秒更新一次，提高毫秒显示精度
+
+  } else {
+
+    // 倒计时模式
+    if (data.timeDisplay === 0) {
+      // 如果是首次开始或重置后开始，设置倒计时时间
+      const { hours, minutes, seconds } = data.countDownTime;
+      data.timeDisplay = (hours * 3600 + minutes * 60 + seconds) * 1000;
+    }
+
+    data.startTime = Date.now() + data.timeDisplay;
+    data.timerID = setInterval(() => {
+
+      data.timeDisplay = Math.max(0, data.startTime - Date.now());
+      data.elapsedTime = (data.startTime - data.timeDisplay) - data.startTime + data.timeDisplay;
+
+      // 倒计时结束
+      if (data.timeDisplay === 0) {
+        pauseTimer();
+        notify({
+          message: '倒计时结束！',
+          type: 'success',
+          title: '提示'
+        });
+      }
+
+    }, 10); // 每10毫秒更新一次，提高毫秒显示精度
+
+  }
+
+  data.isRunning = true;
+
+}
+
+/** 暂停计时器 */
+function pauseTimer() {
+  if (data.timerID) {
+    clearInterval(data.timerID);
+    data.timerID = null;
+    data.isRunning = false;
+  }
+}
+
+/** 重置计时器 */
+function resetTimer() {
+  pauseTimer();
+  data.elapsedTime = 0;
+  data.timeDisplay = 0;
+}
+
+/** 记录时间 */
+function recordTime() {
+
+  data.recordID += 1;
+  data.records.push({
+    id: data.recordID,
+    time: data.timeDisplay,
+    timestamp: Date.now()
+  });
+
+  notify({
+    message: `已记录时间: ${formatTime(data.timeDisplay)}`,
+    type: 'info',
+    title: '记录成功'
+  });
+
+}
+
+/** 清空记录 */
+function clearRecords() {
+  $dialog.create({
+    content: '确定要清空所有时间记录吗？',
+    negativeText: '取消',
+    positiveText: '确定',
+    title: '确认',
+    type: 'default',
+    onPositiveClick: () => {
+      data.records = [];
+      data.recordID = 0;
+    },
+  });
+}
+
+/**
+ * @description 提示信息
+ * @param {object} options
+ * @param {number} options.duration
+ * @param {string} options.message
+ * @param {string} options.title
+ * @param {string} options.type
+ */
+function notify(options) {
+
+  let {
+    duration = 3000,
+    message = '',
+    title = '提示',
+    type = 'info',
+  } = options;
+
+  return $notification.create({
+    content: message,
+    duration: duration,
+    title: title,
+    type: type,
+  });
+
+}
+
+/** 监听计时模式切换 */
+watch(
+  () => data.timerMode,
+  () => {
+    // 切换模式时重置计时器
+    resetTimer();
+  }
+);
+
+/** 监听倒计时时间设置变化 */
+watch(
+  () => [data.countDownTime.hours, data.countDownTime.minutes, data.countDownTime.seconds],
+  () => {
+    // 只有在倒计时模式且计时器未运行时，才更新显示时间
+    if (data.timerMode === 'countDown' && !data.isRunning && data.timeDisplay === 0) {
+      const { hours, minutes, seconds } = data.countDownTime;
+      data.timeDisplay = (hours * 3600 + minutes * 60 + seconds) * 1000;
+    }
+  },
+  { deep: true }
+);
+
+onBeforeUnmount(() => {
+  if (data.timerID) {
+    clearInterval(data.timerID);
+  }
+});
+</script>
+
+<style lang="less" scoped>
+.timer-display {
+  font-size: 48px;
+  font-weight: bold;
+  text-align: center;
+  padding: 20px 0;
+  color: #2196F3;
+  font-family: 'Courier New', monospace;
+  display: flex;
+  align-items: baseline;
+  justify-content: center;
+  gap: 4px;
+
+  .time-main {
+    font-size: 48px;
+  }
+
+  .time-milliseconds {
+    font-size: 32px;
+    color: #666;
+    margin-left: 2px;
+  }
+}
+
+.time-separator {
+  display: flex;
+  align-items: center;
+  justify-content: center;
+  padding: 0 8px;
+  font-size: 16px;
+  color: #666;
+}
+
+.records-content {
+  padding: 8px 16px;
+  border: 1px solid #F0F0F0;
+  border-radius: 4px;
+  background-color: #FFF;
+  line-height: 1.6;
+  max-height: 200px;
+  overflow-y: auto;
+  margin-bottom: 12px;
+
+  .record-item {
+    display: flex;
+    justify-content: space-between;
+    align-items: center;
+    padding: 4px 0;
+    border-bottom: 1px dashed #F0F0F0;
+
+    &:last-child {
+      border-bottom: none;
+    }
+  }
+
+  .record-index {
+    width: 30px;
+    color: #999;
+  }
+
+  .record-time {
+    flex: 1;
+    text-align: center;
+    font-weight: bold;
+    color: #2196F3;
+    font-family: 'Courier New', monospace;
+  }
+
+  .record-timestamp {
+    color: #999;
+    font-size: 12px;
+  }
+
+  .no-records {
+    text-align: center;
+    color: #999;
+    padding: 20px 0;
+  }
+}
+
+.clear-records-btn {
+  display: block;
+  margin-left: auto;
+}
+</style>