diff --git a/components/dfs/include/dfs.h b/components/dfs/include/dfs.h
index 80dc43378771556ad8cdeb217e485b197fe57c11..6af8bbd99fc5f32b67afd6672d52bc005e96805e 100644
--- a/components/dfs/include/dfs.h
+++ b/components/dfs/include/dfs.h
@@ -16,10 +16,13 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <time.h>
-#include <rtthread.h>
+#include <sys/time.h>
 #include <rtdevice.h>
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #ifndef DFS_FILESYSTEMS_MAX
 #define DFS_FILESYSTEMS_MAX     2
 #endif
@@ -63,9 +66,7 @@
 #define DFS_F_EOF               0x04000000
 #define DFS_F_ERR               0x08000000
 
-#ifdef __cplusplus
-extern "C" {
-#endif
+#include <dirent.h>
 
 struct statfs
 {
@@ -74,14 +75,6 @@ struct statfs
     size_t f_bfree;   /* free blocks in file system */
 };
 
-struct dirent
-{
-    uint8_t d_type;           /* The type of the file */
-    uint8_t d_namlen;         /* The length of the not including the terminating null file name */
-    uint16_t d_reclen;        /* length of this record */
-    char d_name[DFS_PATH_MAX];   /* The null-terminated file name */
-};
-
 struct dfs_fdtable
 {
     uint32_t maxfd;
diff --git a/components/dfs/include/dfs_posix.h b/components/dfs/include/dfs_posix.h
index 0475460d9572c041d8e1445070c5a5dcf369bbd5..ec7cdc9de4c84a6f932ccdcfcd2609c623fff3ac 100644
--- a/components/dfs/include/dfs_posix.h
+++ b/components/dfs/include/dfs_posix.h
@@ -21,14 +21,6 @@
 extern "C" {
 #endif
 
-typedef struct
-{
-    int fd;     /* directory file */
-    char buf[512];
-    int num;
-    int cur;
-} DIR;
-
 /* directory api*/
 int mkdir(const char *path, mode_t mode);
 DIR *opendir(const char *name);
diff --git a/components/libc/compilers/common/dirent.h b/components/libc/compilers/common/dirent.h
index bfba586093c498b72e7e4690f7ba1a1334d28f63..6727d96788af241eac8ff280d08c2eae8e13b7af 100644
--- a/components/libc/compilers/common/dirent.h
+++ b/components/libc/compilers/common/dirent.h
@@ -6,10 +6,14 @@
  * Change Logs:
  * Date           Author       Notes
  */
-#ifndef __RTT_DIRENT_H__
-#define __RTT_DIRENT_H__
+#ifndef __DIRENT_H__
+#define __DIRENT_H__
 
-#include <rtthread.h>
+#include <rtdef.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 /*
 * dirent.h - format of directory entries
@@ -26,27 +30,32 @@
 #define DT_REG          0x01
 #define DT_DIR          0x02
 
-#ifdef __cplusplus
-extern "C" {
-#endif
-
 #ifndef HAVE_DIR_STRUCTURE
+#define HAVE_DIR_STRUCTURE
 typedef struct
 {
     int fd;                         /* directory file */
     char buf[512];
     int num;
     int cur;
-} DIR;
+}DIR;
 #endif
 
 #ifndef HAVE_DIRENT_STRUCTURE
+#define HAVE_DIRENT_STRUCTURE
+
+#ifdef DFS_PATH_MAX
+#define DIRENT_NAME_MAX    DFS_PATH_MAX
+#else
+#define DIRENT_NAME_MAX    256
+#endif
+
 struct dirent
 {
     rt_uint8_t  d_type;             /* The type of the file */
     rt_uint8_t  d_namlen;           /* The length of the not including the terminating null file name */
     rt_uint16_t d_reclen;           /* length of this record */
-    char d_name[256];               /* The null-terminated file name */
+    char d_name[DIRENT_NAME_MAX];   /* The null-terminated file name */
 };
 #endif
 
diff --git a/include/libc/libc_dirent.h b/include/libc/libc_dirent.h
deleted file mode 100644
index a86332e633c3a255cce807cae85b2df4b83447d4..0000000000000000000000000000000000000000
--- a/include/libc/libc_dirent.h
+++ /dev/null
@@ -1,17 +0,0 @@
-/*
- * Copyright (c) 2006-2021, RT-Thread Development Team
- *
- * SPDX-License-Identifier: Apache-2.0
- *
- * Change Logs:
- * Date           Author       Notes
- */
-
-#ifndef LIBC_DIRENT_H__
-#define LIBC_DIRENT_H__
-
-#define DT_UNKNOWN           0x00
-#define DT_REG               0x01
-#define DT_DIR               0x02
-
-#endif
diff --git a/include/rtlibc.h b/include/rtlibc.h
index 4b145b1b1b00cd9ce43042dcedae848ad32b0b4b..b59a29dadb6a5dfb39e458aeff23ca95da78b5ff 100644
--- a/include/rtlibc.h
+++ b/include/rtlibc.h
@@ -14,7 +14,6 @@
 /* definitions for libc if toolchain has no these definitions */
 #include "libc/libc_stat.h"
 #include "libc/libc_fcntl.h"
-#include "libc/libc_dirent.h"
 
 #ifndef RT_USING_LIBC
 #if defined(__ARMCC_VERSION) || defined(__IAR_SYSTEMS_ICC__)