diff --git a/components/drivers/tty/n_tty.c b/components/drivers/tty/n_tty.c
index 38bfd9006062e31ccf5bbd73775ee3ee2d1eebe3..955f733098a285de2e9ce25b3a7c89101f17ed5f 100644
--- a/components/drivers/tty/n_tty.c
+++ b/components/drivers/tty/n_tty.c
@@ -10,6 +10,7 @@
 #include <stddef.h>
 #include <ctype.h>
 #include <tty.h>
+#include <lwp.h>
 #if defined(RT_USING_POSIX)
 #include <posix_termios.h>
 #endif
@@ -532,9 +533,30 @@ static void eraser(unsigned char c, struct tty_struct *tty)
 static void __isig(int sig, struct tty_struct *tty)
 {
     struct rt_lwp *lwp = tty->foreground;
+    struct tty_ldisc *ld = RT_NULL;
+    struct termios old_termios;
+    struct termios *new_termios = get_old_termios();
+
     if (lwp)
     {
-        lwp_kill(lwp_to_pid(lwp), sig);
+        if (sig == SIGTSTP)
+        {
+            rt_memcpy(&old_termios, &(tty->init_termios), sizeof(struct termios));
+            tty->init_termios = *new_termios;
+            ld = tty->ldisc;
+            if (ld != RT_NULL)
+            {
+                if (ld->ops->set_termios)
+                {
+                    ld->ops->set_termios(tty, &old_termios);
+                }
+            }
+            tty->foreground = RT_NULL;  
+        }
+        else
+        {
+            lwp_kill(lwp_to_pid(lwp), sig);
+        }
     }
 }
 
diff --git a/components/drivers/tty/tty_ioctl.c b/components/drivers/tty/tty_ioctl.c
index 894353ed845f52d4e0c4c36e10bf5c1dd22c92ad..fb178a65aca9392b90820405059533c66930ff10 100644
--- a/components/drivers/tty/tty_ioctl.c
+++ b/components/drivers/tty/tty_ioctl.c
@@ -36,7 +36,7 @@
 
 static int set_termios(struct tty_struct *tty, void *arg, int opt)
 {
-    struct termios old_termios = tty->init_termios;
+    struct termios old_termios;
     struct tty_ldisc *ld = RT_NULL;
     struct termios *new_termios = (struct termios *)arg;
     int level = 0;
@@ -47,6 +47,7 @@ static int set_termios(struct tty_struct *tty, void *arg, int opt)
         return retval;
     }
 
+    rt_memcpy(&old_termios, &(tty->init_termios), sizeof(struct termios));
     level = rt_hw_interrupt_disable();
     tty->init_termios = *new_termios;
     rt_hw_interrupt_enable(level);
@@ -55,7 +56,7 @@ static int set_termios(struct tty_struct *tty, void *arg, int opt)
     {
         if (ld->ops->set_termios)
         {
-            ld->ops->set_termios(tty, &old_termios);
+            ld->ops->set_termios(tty, old_termios);
         }
     }
     return 0;
diff --git a/components/lwp/lwp.c b/components/lwp/lwp.c
index 02b08d48561b464b8fbd38c8e2c0e1ace3492932..d586d33bac2f6f3652300665bf2beab3aff2ad79 100644
--- a/components/lwp/lwp.c
+++ b/components/lwp/lwp.c
@@ -38,11 +38,16 @@ static const char elf_magic[] = {0x7f, 'E', 'L', 'F'};
 #ifdef DFS_USING_WORKDIR
 extern char working_directory[];
 #endif
-struct termios stdin_termios, old_stdin_termios;
+static struct termios stdin_termios, old_stdin_termios;
 
 extern void lwp_user_entry(void *args, const void *text, void *ustack, void *k_stack);
 int load_ldso(struct rt_lwp *lwp, char *exec_name, char *const argv[], char *const envp[]);
 
+struct termios *get_old_termios(void)
+{
+    return &old_stdin_termios;
+}
+
 void lwp_setcwd(char *buf)
 {
     struct rt_lwp *lwp = RT_NULL;
diff --git a/components/lwp/lwp.h b/components/lwp/lwp.h
index 823231240cf3c1d53aed331af61f70d4624c8ff5..f65c2a94a59e3dedd2710738af1ff3b8acc02e5c 100644
--- a/components/lwp/lwp.h
+++ b/components/lwp/lwp.h
@@ -125,6 +125,7 @@ enum lwp_exit_request_type
     LWP_EXIT_REQUEST_TRIGGERED,
     LWP_EXIT_REQUEST_IN_PROCESS,
 };
+struct termios *get_old_termios(void);
 void lwp_setcwd(char *buf);
 char *lwp_getcwd(void);
 void lwp_request_thread_exit(rt_thread_t thread_to_exit);
diff --git a/components/lwp/lwp_pid.c b/components/lwp/lwp_pid.c
index 3b926de23677e63870775d62c8e20a31c1ec64b0..1b4696d78e6ec3ef32a6ea4f99fd123b24a2971f 100644
--- a/components/lwp/lwp_pid.c
+++ b/components/lwp/lwp_pid.c
@@ -431,11 +431,11 @@ void lwp_free(struct rt_lwp* lwp)
 
     /* for parent */
     {
-        extern struct termios old_stdin_termios;
+        struct termios *old_stdin_termios = get_old_termios();
         struct rt_lwp *self_lwp = (struct rt_lwp *)lwp_self();
         if (lwp->session == -1)
         {
-            tcsetattr(1, 0, &old_stdin_termios);
+            tcsetattr(1, 0, old_stdin_termios);
         }
         if (lwp->tty != RT_NULL)
         {