diff --git a/include/string.h b/include/string.h
new file mode 100644
index 0000000..2db80d1
--- /dev/null
+++ b/include/string.h
@@ -0,0 +1,8 @@
+#include "types.h"
+
+s8 strcmp(const u8 *src,const u8 *des);
+u32 strlen(const u8 *src);
+u8 *strchr(const u8 *src, u8 achar);
+u8 *strncpy(const u8 *src,u8 *des,u32 count);
+u8 *strcat(const u8 *src,u8 *des);
+u8* strcpy(const u8 *src, u8 *des);