diff --git a/docs/Application_guide/zh/hardware/peripheral-interfaces/IIC.md b/docs/Application_guide/zh/hardware/peripheral-interfaces/IIC.md
index 1e96ff7dc436d5fe43a1b22ca412f1719755ab9f..aa9821624ff7c9e6ca2e8f852927ace2edd3abb3 100644
--- a/docs/Application_guide/zh/hardware/peripheral-interfaces/IIC.md
+++ b/docs/Application_guide/zh/hardware/peripheral-interfaces/IIC.md
@@ -88,7 +88,7 @@ I2C.write(slaveaddress, addr, addr_len, data, datalen)
 - addr_len为寄存器地址长度，寄存器地址长度可从外设芯片数据手册中确认，目前经常用到的IIC外设芯片的寄存器地址长度一般是一个字节，如QMA7981三轴传感器芯片。
 <img src="../../media/hardware/peripheral-interfaces/IIC/IIC_reg_lenth.png" style="border-style: solid; border-radius: 10px; color:  #f1f1f1;" border=3 alt="">
 
-API介绍请参考[machine.UART.write](https://python.quectel.com/doc/API_reference/zh/peripherals/machine.UART.html#%3Ccode%3Euart.write%3C/code%3E)
+API介绍请参考[machine.IIC.write](https://python.quectel.com/doc/API_reference/zh/peripherals/machine.I2C.html#<code>I2C.write</code>)
 
 ### 接收数据
 ```python
@@ -101,7 +101,7 @@ I2C.read(slaveaddress, addr, addr_len, r_data, datalen, delay)
 **2. delay参数设置：** 由于部分IIC外设芯片收到主机写数据指令后需要延时才能正常返回数据，所以在模组（主机）发送完写指令后延时一段时间再读取IIC外设芯片数据，如图：
 <img src="../../media/hardware/peripheral-interfaces/IIC/IIC_read_delay.png" style="border-style: solid; border-radius: 10px; color:  #f1f1f1;" border=3 alt="">
 
-API及参数含义介绍请参考[machine.UART.read](https://python.quectel.com/doc/API_reference/zh/peripherals/machine.UART.html#%3Ccode%3Euart.read%3C/code%3E)
+API及参数含义介绍请参考[machine.IIC.read](https://python.quectel.com/doc/API_reference/zh/peripherals/machine.I2C.html#<code>I2C.read</code>)
 
 
 ## 应用案例