diff --git a/rt-thread-version/rt-thread-standard/programming-manual/device/i2c/i2c.md b/rt-thread-version/rt-thread-standard/programming-manual/device/i2c/i2c.md
index d4d914e9e9efb1b786a27c7f4e8509191c521651..1bb215ad8b9eaaa1c4b7809779740e5a75cf90a9 100644
--- a/rt-thread-version/rt-thread-standard/programming-manual/device/i2c/i2c.md
+++ b/rt-thread-version/rt-thread-standard/programming-manual/device/i2c/i2c.md
@@ -166,7 +166,7 @@ rt_size_t rt_i2c_master_send(struct rt_i2c_bus_device *bus,
 | bus                | I2C 总线设备句柄                                             |
 | addr               | I2C 从设备地址                                               |
 | flags              | 标志位，可为上文提到的除 `RT_I2C_WR` `RT_I2C_RD`之外的其他标志位，可以进行 “\|” 操作 |
-| buf                | 待数据数据缓冲区                                             |
+| buf                | 待发送数据缓冲区                                             |
 | count              | 待发送数据大小（单位：字节）                                 |
 | **返回**           | ——                                                           |
 | 消息数组的元素个数 | 成功                                                         |