diff --git a/Software/System/Linux/Modules/KernelDriver/API/printk_说明.md b/Software/System/Linux/Modules/KernelDriver/API/printk_说明.md
new file mode 100644
index 0000000..2f8416f
--- /dev/null
+++ b/Software/System/Linux/Modules/KernelDriver/API/printk_说明.md
@@ -0,0 +1,28 @@
+# printk 说明
+
+## 头文件
+
+```cpp
+#include <linux/kernel.h>
+```
+
+## 函数原型
+
+```cpp
+int printk(const char *fmt, ...);
+```
+
+## 参数说明
+
+在 fmt 字符串前面增加以下宏可以控制 printk 的输出级别，数值越小打印级别越高。当设置的级别地于当前打印级别时，打印信息将不被输出。
+
+```cpp
+#define    KERN_EMERG   "<0>"   /* system is unusable */
+#define    KERN_ALERT   "<1>"   /* action must be taken immediately */
+#define    KERN_CRIT    "<2>"   /* critical conditions */
+#define    KERN_ERR     "<3>"   /* error conditions */
+#define    KERN_WARNING "<4>"   /* warning conditions */
+#define    KERN_NOTICE  "<5>"   /* normal but significant condition */
+#define    KERN_INFO    "<6>"   /* informational */
+#define    KERN_DEBUG
+```