diff --git a/rt-thread-version/rt-thread-standard/_sidebar.md b/rt-thread-version/rt-thread-standard/_sidebar.md
index 83df9a1f76b3f40e5d181dd65e17fa6c939a4302..c97aad4ca2662dd7594f169566c9207071627b21 100644
--- a/rt-thread-version/rt-thread-standard/_sidebar.md
+++ b/rt-thread-version/rt-thread-standard/_sidebar.md
@@ -36,6 +36,7 @@
   - [DAC设备](/rt-thread-version/rt-thread-standard/programming-manual/device/dac/dac.md)
   - [CAN设备](/rt-thread-version/rt-thread-standard/programming-manual/device/can/can.md)
   - [HWTIMER设备](/rt-thread-version/rt-thread-standard/programming-manual/device/hwtimer/hwtimer.md)
+  - [CPUTIME设备](/rt-thread-version/rt-thread-standard/programming-manual/device/cputime/cputime.md)
   - [I2C总线设备](/rt-thread-version/rt-thread-standard/programming-manual/device/i2c/i2c.md)
   - [PWM设备](/rt-thread-version/rt-thread-standard/programming-manual/device/pwm/pwm.md)
   - [RTC设备](/rt-thread-version/rt-thread-standard/programming-manual/device/rtc/rtc.md)
diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/cputime/cputime.md b/rt-thread-version/rt-thread-standard/programming-manual/device/cputime/cputime.md
new file mode 100644
index 0000000000000000000000000000000000000000..65fa72ba139b5cb8d165919bab2782066f0138d7
--- /dev/null
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/cputime/cputime.md
@@ -0,0 +1,156 @@
+# CPUTIME 设备
+
+内核中的定时器是以 tick 为精度实现的。出现精度不高的情况。cputime 通过对接硬件定时器来实现，提高了精度，不过作为代价是，在每个 bsp 中都需要具体实现 cputime 的对接工作。
+
+#### cputime 相关接口
+
+这些定时器接口除了定时器控制块与内核中的定时器不同外，其他的参数、返回值以及用法基本一致，详情请看：[定时器管理方式](/rt-thread-version/rt-thread-standard/programming-manual/timer/timer?id=定时器的管理方式)
+
+| **函数** | **描述**                           |
+| -------------------- | ---------------------------------- |
+| rt_cputimer_detach();|定时器脱离|
+| rt_cputimer_create();|定时器创建|
+| rt_cputimer_delete();|定时器删除|
+| rt_cputimer_start();|定时器启动|
+| rt_cputimer_stop();|定时器停止|
+| rt_cputimer_control();|定时器控制|
+
+这些是一些高精度延时的接口（这里只提供了接口，具体精度能不能达到还是要看硬件定时器中的实现）
+
+| **函数** | **描述**                           |
+| -------------------- | ---------------------------------- |
+| rt_cputime_sleep();|cputime tick 精度延时|
+| rt_cputime_ndelay();|纳秒精度延时|
+| rt_cputime_udelay();|微秒精度延时|
+| rt_cputime_mdelay();|毫秒精度延时|
+
+#### 如何对接 cputime?
+
+1. 对接硬件定时器，使其形成单调递增的时钟，并且到达指定时间可以触发回调
+2. 根据硬件定时器的精度情况来对接 cputime 的 ops
+
+下面是一些如何对接到 cputime 的示例代码
+
+```c
+
+#include <rthw.h>
+#include <rtdevice.h>
+#include <rtthread.h>
+
+#include <board.h>
+
+#define HWTIMER_DEV_NAME   "timer7"
+
+/* 递增 count 作为 cpu tick 使用，不可被设置，只可单调递增 */
+rt_uint64_t count = 0;
+
+/* 当 CPU tick 到达 timeout_tick 时触发回调 */
+rt_uint64_t timeout_tick = 0;
+
+void (*hwtimer_timeout)(void *param);
+void *parameter = RT_NULL;
+
+/* 精度 ns */
+static double cortexm_cputime_getres(void)
+{
+    return 10000;
+}
+
+/* cpu tick */
+static uint64_t cortexm_cputime_gettime(void)
+{
+	return count;
+}
+
+/* 设置超时时间及函数 */
+static int cortexm_cputime_settimeout(uint64_t tick, void (*timeout)(void *param), void *param)
+{
+	timeout_tick = tick;
+	hwtimer_timeout = timeout;
+	parameter = param;
+	return 0;
+}
+
+/* 定义 ops */
+const static struct rt_clock_cputime_ops _cortexm_ops =
+{
+    cortexm_cputime_getres,
+    cortexm_cputime_gettime,
+	cortexm_cputime_settimeout
+};
+
+/* 初始化 ops */
+int cortexm_cputime_init(void)
+{
+    /* bsp 在这样使用的时候，不用管内部有没有实现，这个函数会覆盖掉内部的实现 */
+    clock_cpu_setops(&_cortexm_ops);
+    return 0;
+}
+INIT_BOARD_EXPORT(cortexm_cputime_init);
+
+/* 硬件定时器超时函数 */
+static rt_err_t timeout_cb(rt_device_t dev, rt_size_t size)
+{
+    count++;
+    if(count == timeout_tick)
+    {
+        /* 到达指定时间后清空到达时间，并触发回调 */
+        timeout_tick = 0;
+        if(hwtimer_timeout != RT_NULL)
+            hwtimer_timeout(parameter);
+    }
+    return 0;
+}
+
+/* 硬件定时器初始化 */
+static int hwtimer_init()
+{
+    rt_err_t ret = RT_EOK;
+    rt_hwtimerval_t timeout_s;    
+    rt_device_t hw_dev = RT_NULL; 
+    rt_hwtimer_mode_t mode;     
+    rt_uint32_t freq = 1000000;            
+
+    hw_dev = rt_device_find(HWTIMER_DEV_NAME);
+    if (hw_dev == RT_NULL)
+    {   
+        /* 硬件定时器失败时，清空设置超时的函数，使 cputime 不可用，
+        防止使用 rt_cputime_sleep() 时卡死 */
+        _cortexm_ops.cputime_settimeout = RT_NULL;
+        rt_kprintf("hwtimer sample run failed! can't find %s device!\n", HWTIMER_DEV_NAME);
+        return RT_ERROR;
+    }
+
+    ret = rt_device_open(hw_dev, RT_DEVICE_OFLAG_RDWR);
+    if (ret != RT_EOK)
+    {
+        _cortexm_ops.cputime_settimeout = RT_NULL;
+        rt_kprintf("open %s device failed!\n", HWTIMER_DEV_NAME);
+        return ret;
+    }
+    /* 设置硬件定时器的超时时间 */
+    rt_device_set_rx_indicate(hw_dev, timeout_cb);
+
+    rt_device_control(hw_dev, HWTIMER_CTRL_FREQ_SET, &freq);
+    mode = HWTIMER_MODE_PERIOD;
+    ret = rt_device_control(hw_dev, HWTIMER_CTRL_MODE_SET, &mode);
+    if (ret != RT_EOK)
+    {
+        _cortexm_ops.cputime_settimeout = RT_NULL;
+        rt_kprintf("set mode failed! ret is :%d\n", ret);
+        return ret;
+    }
+    timeout_s.sec = 0;   
+    timeout_s.usec = 10;
+
+    /* 设置硬件定时器的精度，这里应和上述的 cortexm_cputime_getres 函数保持一致 */
+    if (rt_device_write(hw_dev, 0, &timeout_s, sizeof(timeout_s)) != sizeof(timeout_s))
+    {
+        _cortexm_ops.cputime_settimeout = RT_NULL;
+        rt_kprintf("set timeout value failed\n");
+        return RT_ERROR;
+    }
+    return ret;
+}
+INIT_APP_EXPORT(hwtimer_init);
+```