diff --git a/docs/doc/component/drvmodel.md b/docs/doc/component/drvmodel.md
index 554ebc9..8609b2d 100644
--- a/docs/doc/component/drvmodel.md
+++ b/docs/doc/component/drvmodel.md
@@ -14,8 +14,9 @@
 
 xs_Device 结构体同样采用类似面向对象的方法，它集合了所有设备的共有特征，为设备的基类。平台上接入的具体设备以它为基类进行派生，如 IICHardwareDevice 、USBHardwareDevice 、SPIHardwareDevice 、CANHardwareDevice等。从而为众多不同性质的设备实现统一的管理架构。
 
+## 关键数据结构
 
-## struct xs_Bus结构
+* struct xs_Bus结构
 ```c
 struct xs_Bus {
     char Bus_name[XS_NAME_MAX];       /* name of bus */
@@ -49,7 +50,7 @@ enum xs_BusType {
 xs_BusType成员表示不同的总线类型，其具体定义在上文给出。
 
 
-### enum Bus_priority枚举结构
+* enum Bus_priority枚举结构
 ```c
 enum Bus_priority{
     PriorityLevelOne = 1,
@@ -64,7 +65,7 @@ enum Bus_priority{
 Bus_priority变量表示总线优先级，数值越低优先级越高
 
 
-### struct xs_IIC_bus结构
+* struct xs_IIC_bus结构
 ```c
 struct xs_I2CBus {
     struct xs_Bus bus;    /* Basic properties of the bus */
@@ -73,7 +74,7 @@ struct xs_I2CBus {
 ```
 speed成员记录I2C总线与传感器设备通信的速率
 
-### struct xs_SPIBus结构
+* struct xs_SPIBus结构
 ```c
 struct xs_SPIBus {
     struct xs_Bus bus;            /* Basic properties of the bus */
@@ -84,7 +85,7 @@ struct xs_SPIBus {
 ```
 CPHA成员记录SPI总线的时钟相位，CPOL成员记录SPI总线的时钟极性
 
-### struct xs_CANBus结构
+* struct xs_CANBus结构
 ```c
 struct xs_CAN_bus {
     struct xs_Bus bus;    /* Basic properties of the bus */
@@ -93,7 +94,7 @@ struct xs_CAN_bus {
 };
 ```
 
-### struct xs_USBBus结构
+* struct xs_USBBus结构
 ```c
 struct xs_USB_bus {
     struct xs_Bus bus;    /* Basic properties of the bus */
@@ -103,7 +104,7 @@ struct xs_USB_bus {
 ```
 
 
-## struct xs_Device结构
+* struct xs_Device结构
 ```c
 typedef struct xs_Device {
     char dev_name[XS_NAME_MAX];   /* name of device */
@@ -122,7 +123,7 @@ typedef struct xs_Device * xs_DevicePointer ;
 
 
 
-### struct device_ops结构
+* struct device_ops结构
 ```c
  struct device_ops{
     int (*init)(struct xs_Device * dev);
@@ -135,9 +136,9 @@ typedef struct xs_Device * xs_DevicePointer ;
 ```
 device_ops包含统一的、类似文件系统的API，用于对具体外设进行实际的数据读写。如在使用一个传感器前后需要打开（open）/关闭（close）该传感器，read、write分别用与从传感器接收数据与向传感器发送数据，ioctl用于配置传感器属性（如波特率）
 
-### struct xs_HardwareDev结构
+* struct xs_HardwareDev结构
+```c
 struct xs_HardwareDev{
-
     struct xs_Device dev;
     struct device_ops ops;
 
@@ -146,11 +147,10 @@ struct xs_HardwareDev{
 	void (*shutdown)(struct xs_Device * dev);
 	int (*suspend)(struct xs_Device * dev, int state);
 	int (*resume)(struct xs_Device * dev);
-
 };
 ```
 
-## struct IICHardwareDevice结构
+* struct IICHardwareDevice结构
 ```c
  struct IICHardwareDevice{
      struct xs_HardwareDev hardware;
@@ -159,7 +159,7 @@ struct xs_HardwareDev{
  }
 ```
 
-### struct SPIHardwareDevice结构
+* struct SPIHardwareDevice结构
 ```c
  struct SPIHardwareDevice{
      struct xs_HardwareDev hardware;
@@ -168,7 +168,7 @@ struct xs_HardwareDev{
  }
 ```
 
-### struct CANHardwareDevice结构
+* struct CANHardwareDevice结构
 ```c
  struct CANHardwareDevice{
      struct xs_HardwareDev hardware;
@@ -177,7 +177,7 @@ struct xs_HardwareDev{
  }
 ```
 
-### struct USBHardwareDevice结构
+* struct USBHardwareDevice结构
 ```c
  struct USBHardwareDevice{
      struct xs_HardwareDev hardware;
@@ -187,10 +187,9 @@ struct xs_HardwareDev{
 ```
 
 
-## struct xs_DeviceDriver结构
+* struct xs_DeviceDriver结构
  ```c
 struct xs_DeviceDriver{
-
     char driver_name[XS_NAME_MAX];
     struct bus_type  *  bus;
     enum driver_state falg;
@@ -204,13 +203,14 @@ struct xs_DeviceDriver{
         struct xs_DeviceDriver * next;
         void * data;
     };
-
-}Device_driver_head;
+} Device_driver_head;
  ```
 
 
 ## 使用场景
-在获取i2c数据前，需要匹配设备驱动，设备驱动打开后对设备进行读写，使用完毕后，须关闭设备驱动。完整的使用过程示例如下：
+在获取i2c数据前，要匹配设备驱动，在设备驱动打开后对设备进行读写。使用完毕后，关闭设备驱动。  
+
+完整的使用过程示例如下：
 ```c
 int main(int argc, char *argv[])
 {
@@ -219,9 +219,9 @@ int main(int argc, char *argv[])
 
     /* find the i2c device instance */
     dev = (struct xs_I2cDevice*)xs_DeviceFind("i2c_temp",XS_IIC_BUS);         //获取设备句柄
-    if(dev==NULL)
+    if(dev == NULL)
     {
-        xs_kprintf("find iic device error\n")
+        xs_kprintf("find iic device error\n");
     }
    
     /* open the device instance */
diff --git a/docs/doc/kernel/tmr.md b/docs/doc/kernel/tmr.md
index c9b6eaa..aa2b992 100644
--- a/docs/doc/kernel/tmr.md
+++ b/docs/doc/kernel/tmr.md
@@ -74,7 +74,7 @@ struct xs_Timer
 	xs_tick_x           origin_timeslice; 	///< 超时时间
     xs_tick_x           deadline_timeslice; ///< 截止时间
     XS_DOUBLE_LINKLIST  link;               ///< 管理链表
-    XS_DOUBLE_LINKLIST  levels[XS_TIMER_SKIP_LIST_LEVEL]; ///< 查询链表
+    XS_DOUBLE_LINKLIST  Sortlist; ///< 查询链表
 };
 typedef struct xs_Timer *xs_timer_x;
 ```