diff --git a/components/libc/Kconfig b/components/libc/Kconfig
index 9e1609000d44bf6d444345bc88c049577812cbb7..c988ada354f24ab2c37377f3cb0ce16a3d61049a 100644
--- a/components/libc/Kconfig
+++ b/components/libc/Kconfig
@@ -1,87 +1,92 @@
 menu "POSIX layer and C standard library"
-
-config RT_USING_LIBC
-    bool "Enable libc APIs from toolchain"
-    default y
-
-if RT_USING_LIBC && RT_USING_LWP
-    choice
-        prompt "Select c standard library"
-        default RT_USING_MUSL
-        help
-            Select c standard library
-
-        config RT_USING_NEWLIB
-        bool "Use libc: newlib"
-
-        config RT_USING_MUSL
-        bool "Use libc: musl (libc.a/libm.a in RT-Thread)"
-
-    endchoice
-endif
-
-config RT_USING_PTHREADS
-    bool "Enable pthreads APIs"
-    default n
-
-if RT_USING_PTHREADS
-    config PTHREAD_NUM_MAX
-    int "Maximum number of pthreads"
-    default 8
-endif
-
-if RT_USING_LIBC && RT_USING_DFS
-    config RT_USING_POSIX
-        bool "Enable POSIX layer for poll/select, stdin etc"
-        select RT_USING_DFS_DEVFS
-        default y
-
-    if RT_USING_POSIX
-    config RT_USING_POSIX_MMAP
-        bool "Enable mmap() API"
-        default n
-
-    config RT_USING_POSIX_TERMIOS
-        bool "Enable termios APIs"
-        default n
-
-    config RT_USING_POSIX_GETLINE
-        bool "Enable getline()/getdelim() APIs"
-        default n
-
-    config RT_USING_POSIX_AIO
-        bool "Enable AIO"
-        default n
-
-    config RT_POSIX_AIO_THREAD_STACK_SIZE
-        int "Set posix aio thread stack size"
-        default 2048
-        depends on RT_USING_POSIX_AIO
-
-    config RT_USING_POSIX_CLOCKTIME
-        bool "Enable POSIX clock_time APIs"
-        default n
+    config RT_USING_SELECT_LIBC
+        bool "select libc or mlibc"
+            default y 
+    if RT_USING_SELECT_LIBC
+        choice
+            prompt "Select libc or mlibc"
+            default RT_USING_LIBC
+            help
+                Select libc or mlibc
+
+            config RT_USING_LIBC
+                bool "Enable libc APIs from toolchain"
+  
+            config RT_USING_MLIBC
+                bool "Enable libc APIs from mlibc"
+        endchoice       
     endif
 
-endif
+    if RT_USING_LIBC && RT_USING_LWP
+        choice
+            prompt "Select c standard library"
+            default RT_USING_MUSL
+            help
+                Select c standard library
 
-if RT_USING_LIBC
-    config RT_USING_MODULE
-        bool "Enable dynamic module with dlopen/dlsym/dlclose feature"
-        default n
+            config RT_USING_NEWLIB
+                    bool "Use libc: newlib"
 
-    if RT_USING_MODULE
-    config RT_USING_CUSTOM_DLMODULE
-        bool "Enable load dynamic module by custom"
-        default n
+            config RT_USING_MUSL
+                    bool "Use libc: musl (libc.a/libm.a in RT-Thread)"
+        endchoice
+    endif
+    if RT_USING_LIBC && RT_USING_DFS
+        config RT_USING_POSIX
+            bool "Enable POSIX layer for poll/select, stdin etc"
+            select RT_USING_DFS_DEVFS
+            default y
+
+        if RT_USING_POSIX
+            config RT_USING_POSIX_MMAP
+                bool "Enable mmap() API"
+                default n
+
+            config RT_USING_POSIX_TERMIOS
+                bool "Enable termios APIs"
+                default n
+
+            config RT_USING_POSIX_GETLINE
+                bool "Enable getline()/getdelim() APIs"
+                default n
+
+            config RT_USING_POSIX_AIO
+                bool "Enable AIO"
+                default n
+
+            config RT_POSIX_AIO_THREAD_STACK_SIZE
+                int "Set posix aio thread stack size"
+                default 2048
+                depends on RT_USING_POSIX_AIO
+
+            config RT_USING_POSIX_CLOCKTIME
+                bool "Enable POSIX clock_time APIs"
+                default n
+        endif
+    endif
+    if RT_USING_LIBC
+        config RT_USING_MODULE
+            bool "Enable dynamic module with dlopen/dlsym/dlclose feature"
+            default n
+
+        if RT_USING_MODULE
+            config RT_USING_CUSTOM_DLMODULE
+                bool "Enable load dynamic module by custom"
+                default n
+        endif
+        config RT_USING_PTHREADS
+            bool "Enable pthreads APIs"
+            default n
+
+        if RT_USING_PTHREADS
+            config PTHREAD_NUM_MAX
+            int "Maximum number of pthreads"
+            default 8
+        endif
+    endif
+    if RT_USING_LIBC != y
+            config RT_LIBC_USING_TIME
+            bool "Enable TIME FUNCTIONS WITHOUT COMPILER'S LIBC"
+            default y
     endif
-
-endif
-
-if RT_USING_LIBC != y
-        config RT_LIBC_USING_TIME
-        bool "Enable TIME FUNCTIONS WITHOUT COMPILER'S LIBC"
-        default y
-endif
-
 endmenu
diff --git a/components/lwp/Kconfig b/components/lwp/Kconfig
index da5ca2a1906ad0a6b73c559cdc7d33ca6d758d13..66d51f3b59ba362685705b71e5fd6411ae8e1bfc 100644
--- a/components/lwp/Kconfig
+++ b/components/lwp/Kconfig
@@ -1,7 +1,7 @@
 config RT_USING_LWP
     bool "Using light-weight process"
     select RT_USING_DFS
-    select RT_USING_LIBC
+    select RT_USING_SELECT_LIBC
     select RT_USING_POSIX_CLOCKTIME
     depends on ARCH_ARM_CORTEX_M || ARCH_ARM_ARM9 || ARCH_ARM_CORTEX_A || ARCH_RISCV64
     default n
diff --git a/components/net/Kconfig b/components/net/Kconfig
index 3a4f39ed49f4b7d86288d549646448cdb8172d65..8d27ceba536fc01c5891fb87c4935ec09d905b31 100644
--- a/components/net/Kconfig
+++ b/components/net/Kconfig
@@ -36,7 +36,7 @@ config RT_USING_SAL
             bool "Enable BSD socket operated by file system API"
             default n
             select RT_USING_DFS
-            select RT_USING_LIBC
+            select RT_USING_SELECT_LIBC
             select RT_USING_POSIX
             help
                 Let BSD socket operated by file system API, such as read/write and involveed in select/poll POSIX APIs.
diff --git a/include/rtdebug.h b/include/rtdebug.h
index b66cd6fc694a864d8180b115d0ed895f6f0e88b7..6bee924934758fd4e3940616fda48ad335cd41d9 100644
--- a/include/rtdebug.h
+++ b/include/rtdebug.h
@@ -15,8 +15,8 @@
 #error "POSIX poll/select, stdin need file system(RT_USING_DFS) and device file system(RT_USING_DFS_DEVFS)"
 #endif
 
-#if !defined(RT_USING_LIBC)
-#error "POSIX layer need standard C library(RT_USING_LIBC)"
+#if !defined(RT_USING_LIBC) && !defined(RT_USING_MLIBC)
+#error "POSIX layer need standard C library(RT_USING_LIBC OR RT_USING_MLIBC)"
 #endif
 
 #endif