diff --git a/Kconfig b/Kconfig
index d1116bea..0e14c0f5 100644
--- a/Kconfig
+++ b/Kconfig
@@ -597,6 +597,11 @@ config VM_OVERLAP_CHECK
     depends on DEBUG_VERSION && MEM_DEBUG
     help
       Answer Y to enable vm overlap check.
+      
+config TASK_MEM_USED
+    bool "Enable show task mem used or not"
+    default n
+    depends on DEBUG_VERSION && MEM_DEBUG
 
 endmenu
 
diff --git a/components/shell/include/shcmd.h b/components/shell/include/shcmd.h
index 4c7cd9cc..3026fcad 100644
--- a/components/shell/include/shcmd.h
+++ b/components/shell/include/shcmd.h
@@ -94,6 +94,7 @@ extern INT32 VfsNormalizePath(const CHAR *directory, const CHAR *filename, CHAR
 extern INT32 OsShellCmdDate(INT32 argc, const CHAR **argv);
 extern INT32 OsShellCmdDumpTask(INT32 argc, const CHAR **argv);
 extern UINT32 OsShellCmdFree(INT32 argc, const CHAR **argv);
+extern UINT32 OsShellCmdWaterLine(INT32 argc, const CHAR **argv);
 extern UINT32 lwip_ifconfig(INT32 argc, const CHAR **argv);
 extern UINT32 OsShellPing(INT32 argc, const CHAR **argv);
 extern INT32 OsShellCmdTouch(INT32 argc, const CHAR **argv);
diff --git a/components/shell/src/base/shcmd.c b/components/shell/src/base/shcmd.c
index 1bd0e48f..2f8668c7 100644
--- a/components/shell/src/base/shcmd.c
+++ b/components/shell/src/base/shcmd.c
@@ -51,6 +51,9 @@ CmdItem g_shellcmdAll[] = {
     {CMD_TYPE_STD, "date", XARGS, (CmdCallBackFunc)OsShellCmdDate},
     {CMD_TYPE_EX, "task", 1, (CmdCallBackFunc)OsShellCmdDumpTask},
     {CMD_TYPE_EX, "free", XARGS, (CmdCallBackFunc)OsShellCmdFree},
+#if (LOSCFG_MEM_WATERLINE == 1)
+    {CMD_TYPE_EX, "memusage", XARGS, (CmdCallBackFunc)OsShellCmdWaterLine},
+#endif
 #ifdef LWIP_SHELLCMD_ENABLE
     {CMD_TYPE_EX, "ifconfig", XARGS, (CmdCallBackFunc)lwip_ifconfig},
     {CMD_TYPE_EX, "ping", XARGS, (CmdCallBackFunc)OsShellPing},
diff --git a/components/shell/src/cmds/mempt_shellcmd.c b/components/shell/src/cmds/mempt_shellcmd.c
index 7e3f30e4..bc743f12 100644
--- a/components/shell/src/cmds/mempt_shellcmd.c
+++ b/components/shell/src/cmds/mempt_shellcmd.c
@@ -79,3 +79,32 @@ LITE_OS_SEC_TEXT_MINOR UINT32 OsShellCmdFree(INT32 argc, const CHAR *argv[])
     return 0;
 }
 
+#if (LOSCFG_MEM_WATERLINE == 1)
+LITE_OS_SEC_TEXT_MINOR UINT32 OsShellCmdWaterLine(INT32 argc, const CHAR *argv[])
+{
+    UINT32 ret;
+    LOS_MEM_POOL_STATUS poolStatus;
+
+    if (argc > 1) {
+        PRINTK("\nUsage: memusage or memusage [-k/-m]\n");
+        return OS_ERROR;
+    }
+
+    if (LOS_MemInfoGet(m_aucSysMem0, &poolStatus) != LOS_OK) {
+        return OS_ERROR;
+    }
+
+    if ((argc == 1) && (strcmp(argv[0], "-k") == 0)) {
+        PRINTK("Mem WaterLine:    %-9u\n", MEM_SIZE_TO_KB(poolStatus.usageWaterLine));
+    } else if ((argc == 1) && (strcmp(argv[0], "-m") == 0)) {
+        PRINTK("Mem WaterLine:    %-9u\n", MEM_SIZE_TO_MB(poolStatus.usageWaterLine));
+    } else if (argc == 0) {
+        PRINTK("Mem WaterLine:    %-9u\n", poolStatus.usageWaterLine);
+    } else {
+        PRINTK("\nUsage: memusage or memusage [-k/-m]\n");
+        return OS_ERROR;
+    }
+
+    return 0;
+}
+#endif
diff --git a/kernel/src/los_task.c b/kernel/src/los_task.c
index c12515c4..4c19feee 100644
--- a/kernel/src/los_task.c
+++ b/kernel/src/los_task.c
@@ -307,18 +307,28 @@ LITE_OS_SEC_TEXT_MINOR UINT32 OsGetAllTskCpupInfo(CPUP_INFO_S **cpuLessOneSec,
 LITE_OS_SEC_TEXT_MINOR VOID OsPrintAllTskInfoHeader(VOID)
 {
     PRINTK("\r\n TID  Priority   Status StackSize WaterLine StackPoint TopOfStack EventMask  SemID");
+#if (LOSCFG_TASK_MEM_USED == 1)
+    PRINTK(" AllocSize");
+#endif
 #if (LOSCFG_BASE_CORE_CPUP == 1)
     PRINTK("  CPUUSE CPUUSE10s CPUUSE1s ");
 #endif /* LOSCFG_BASE_CORE_CPUP */
     PRINTK("  TaskEntry name\n");
     PRINTK(" ---  -------- -------- ");
     PRINTK("--------- --------- ---------- ---------- --------- ------ ");
+#if (LOSCFG_TASK_MEM_USED == 1)
+    PRINTK("--------- ");
+#endif
 #if (LOSCFG_BASE_CORE_CPUP == 1)
     PRINTK("------- --------- --------  ");
 #endif /* LOSCFG_BASE_CORE_CPUP */
     PRINTK("---------- ----\n");
 }
 
+#if (LOSCFG_TASK_MEM_USED == 1)
+STATIC UINT32                              g_taskMemUsed[LOSCFG_BASE_CORE_TSK_LIMIT + 1];
+#endif
+
 /*****************************************************************************
  Function    : OsGetAllTskInfo
  Description : Get all task info.
@@ -338,6 +348,11 @@ LITE_OS_SEC_TEXT_MINOR UINT32 OsGetAllTskInfo(VOID)
     CPUP_INFO_S *cpuOneSec = (CPUP_INFO_S *)NULL;
 #endif
 
+#if (LOSCFG_TASK_MEM_USED == 1)
+    (VOID)memset_s(g_taskMemUsed, sizeof(UINT32) * g_taskMaxNum, 0, sizeof(UINT32) * g_taskMaxNum);
+    OsTaskMemUsed((VOID *)OS_SYS_MEM_ADDR, g_taskMemUsed, g_taskMaxNum);
+#endif
+
 #if (LOSCFG_BASE_CORE_CPUP == 1)
     if (OsGetAllTskCpupInfo(&cpuLessOneSec, &cpuTenSec, &cpuOneSec) != LOS_OK) {
         return OS_ERROR;
@@ -357,6 +372,9 @@ LITE_OS_SEC_TEXT_MINOR UINT32 OsGetAllTskInfo(VOID)
                taskCB->taskID, taskCB->priority, OsConvertTskStatus(taskCB->taskStatus),
                taskCB->stackSize, OsGetTaskWaterLine(taskCB->taskID),
                (UINT32)(UINTPTR)taskCB->stackPointer, taskCB->topOfStack, taskCB->eventMask, semID);
+#if (LOSCFG_TASK_MEM_USED == 1)
+        PRINTK("%#10x", g_taskMemUsed[loopNum]);
+#endif
 
 #if (LOSCFG_BASE_CORE_CPUP == 1)
         PRINTK("%6u.%-2u%7u.%-2u%6u.%-2u ",