diff --git a/components/bt/host/bluedroid/bta/dm/bta_dm_act.c b/components/bt/host/bluedroid/bta/dm/bta_dm_act.c
index 769b494461..f4652cab73 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_act.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_act.c
@@ -5300,23 +5300,6 @@ void bta_dm_ble_set_scan_fil_params(tBTA_DM_MSG *p_data)
 }
 #endif // #if (BLE_42_SCAN_EN == TRUE)
 
-#if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-/*******************************************************************************
-**
-** Function         bta_dm_ble_set_conn_scan_params
-**
-** Description      This function set the preferred connection scan parameters.
-**
-** Parameters:
-**
-*******************************************************************************/
-void bta_dm_ble_set_conn_scan_params (tBTA_DM_MSG *p_data)
-{
-    BTM_BleSetConnScanParams(p_data->ble_set_conn_scan_params.scan_int,
-                             p_data->ble_set_conn_scan_params.scan_window);
-}
-#endif // #if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-
 /*******************************************************************************
 **
 ** Function         bta_dm_ble_update_conn_params
diff --git a/components/bt/host/bluedroid/bta/dm/bta_dm_api.c b/components/bt/host/bluedroid/bta/dm/bta_dm_api.c
index b3ab0579c6..c72d688ebe 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_api.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_api.c
@@ -1456,33 +1456,6 @@ void BTA_DmSetBlePrefConnParams(BD_ADDR bd_addr,
 #endif
 }
 
-#if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-/*******************************************************************************
-**
-** Function         BTA_DmSetBleConnScanParams
-**
-** Description      This function is called to set scan parameters used in
-**                  BLE connection request
-**
-** Parameters:      scan_interval    - scan interval
-**                  scan_window      - scan window
-**
-** Returns          void
-**
-*******************************************************************************/
-void BTA_DmSetBleConnScanParams(UINT32 scan_interval, UINT32 scan_window)
-{
-    tBTA_DM_API_BLE_SCAN_PARAMS  *p_msg;
-    if ((p_msg = (tBTA_DM_API_BLE_SCAN_PARAMS *)osi_malloc(sizeof(tBTA_DM_API_BLE_SCAN_PARAMS))) != NULL) {
-        memset(p_msg, 0, sizeof(tBTA_DM_API_BLE_SCAN_PARAMS));
-        p_msg->hdr.event = BTA_DM_API_BLE_CONN_SCAN_PARAM_EVT;
-        p_msg->scan_int         = scan_interval;
-        p_msg->scan_window      = scan_window;
-        bta_sys_sendmsg(p_msg);
-    }
-}
-#endif // #if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-
 #if (BLE_HOST_BLE_SCAN_PARAM_UNUSED == TRUE)
 /*******************************************************************************
 **
diff --git a/components/bt/host/bluedroid/bta/dm/bta_dm_main.c b/components/bt/host/bluedroid/bta/dm/bta_dm_main.c
index e0c52d8628..eeea850b1b 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_main.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_main.c
@@ -142,9 +142,6 @@ const tBTA_DM_ACTION bta_dm_action[BTA_DM_MAX_EVT] = {
 #endif  ///SMP_INCLUDED == TRUE
     bta_dm_ble_set_bg_conn_type,
     bta_dm_ble_set_conn_params,             /* BTA_DM_API_BLE_CONN_PARAM_EVT */
-#if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-    bta_dm_ble_set_conn_scan_params,        /* BTA_DM_API_BLE_CONN_SCAN_PARAM_EVT */
-#endif // #if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
 #if (BLE_HOST_BLE_SCAN_PARAM_UNUSED == TRUE)
     bta_dm_ble_set_scan_params,             /* BTA_DM_API_BLE_SCAN_PARAM_EVT */
 #endif // #if (BLE_HOST_BLE_SCAN_PARAM_UNUSED == TRUE)
diff --git a/components/bt/host/bluedroid/bta/dm/include/bta_dm_int.h b/components/bt/host/bluedroid/bta/dm/include/bta_dm_int.h
index a54839e683..275de8c370 100644
--- a/components/bt/host/bluedroid/bta/dm/include/bta_dm_int.h
+++ b/components/bt/host/bluedroid/bta/dm/include/bta_dm_int.h
@@ -128,9 +128,6 @@ enum {
 #endif  ///SMP_INCLUDED == TRUE
     BTA_DM_API_BLE_SET_BG_CONN_TYPE,
     BTA_DM_API_BLE_CONN_PARAM_EVT,
-#if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-    BTA_DM_API_BLE_CONN_SCAN_PARAM_EVT,
-#endif // #if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
 #if (BLE_HOST_BLE_SCAN_PARAM_UNUSED == TRUE)
     BTA_DM_API_BLE_SCAN_PARAM_EVT,
 #endif // #if (BLE_HOST_BLE_SCAN_PARAM_UNUSED == TRUE)
@@ -871,15 +868,6 @@ typedef struct {
     tBLE_SCAN_PARAM_SETUP_CBACK scan_param_setup_cback;
 } tBTA_DM_API_BLE_SCAN_FILTER_PARAMS;
 
-#if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-/* set scan parameter for BLE connections */
-typedef struct {
-    BT_HDR                  hdr;
-    UINT16                  scan_int;
-    UINT16                  scan_window;
-} tBTA_DM_API_BLE_CONN_SCAN_PARAMS;
-#endif // #if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-
 /* Data type for start/stop observe */
 typedef struct {
     BT_HDR                  hdr;
@@ -1822,9 +1810,6 @@ typedef union {
     tBTA_DM_API_BLE_SEC_GRANT           ble_sec_grant;
     tBTA_DM_API_BLE_SET_BG_CONN_TYPE    ble_set_bd_conn_type;
     tBTA_DM_API_BLE_CONN_PARAMS         ble_set_conn_params;
-#if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-    tBTA_DM_API_BLE_CONN_SCAN_PARAMS    ble_set_conn_scan_params;
-#endif // #if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
 #if (BLE_HOST_BLE_SCAN_PARAM_UNUSED == TRUE)
     tBTA_DM_API_BLE_SCAN_PARAMS         ble_set_scan_params;
 #endif // #if (BLE_HOST_BLE_SCAN_PARAM_UNUSED == TRUE)
@@ -2406,9 +2391,6 @@ extern void bta_dm_ble_set_bg_conn_type (tBTA_DM_MSG *p_data);
 extern void bta_dm_ble_set_conn_params (tBTA_DM_MSG *p_data);
 extern void bta_dm_ble_set_scan_params(tBTA_DM_MSG *p_data);
 extern void bta_dm_ble_set_scan_fil_params(tBTA_DM_MSG *p_data);
-#if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-extern void bta_dm_ble_set_conn_scan_params (tBTA_DM_MSG *p_data);
-#endif // #if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
 #if ((defined BTA_GATT_INCLUDED) &&  (BTA_GATT_INCLUDED == TRUE) && SDP_INCLUDED == TRUE) && (GATTC_INCLUDED == TRUE)
 extern void bta_dm_close_gatt_conn(tBTA_DM_MSG *p_data);
 #endif /* ((defined BTA_GATT_INCLUDED) &&  (BTA_GATT_INCLUDED == TRUE) && SDP_INCLUDED == TRUE) && (GATTC_INCLUDED == TRUE) */
diff --git a/components/bt/host/bluedroid/common/include/common/bt_target.h b/components/bt/host/bluedroid/common/include/common/bt_target.h
index 7dae4c2e3d..3bcdd79d2a 100644
--- a/components/bt/host/bluedroid/common/include/common/bt_target.h
+++ b/components/bt/host/bluedroid/common/include/common/bt_target.h
@@ -1659,10 +1659,6 @@
 #define BLE_HOST_BLE_SCAN_PARAM_UNUSED           FALSE
 #endif
 
-#ifndef BLE_HOST_CONN_SCAN_PARAM_EN
-#define BLE_HOST_CONN_SCAN_PARAM_EN              FALSE
-#endif
-
 #ifndef BLE_HOST_SETUP_STORAGE_EN
 #define BLE_HOST_SETUP_STORAGE_EN              FALSE
 #endif
diff --git a/components/bt/host/bluedroid/stack/btm/btm_ble.c b/components/bt/host/bluedroid/stack/btm/btm_ble.c
index a99614e93c..60601893da 100644
--- a/components/bt/host/bluedroid/stack/btm/btm_ble.c
+++ b/components/bt/host/bluedroid/stack/btm/btm_ble.c
@@ -549,48 +549,6 @@ void BTM_BleSecureConnectionCreateOobData(void)
 #endif
 }
 
-#if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-/******************************************************************************
-**
-** Function         BTM_BleSetConnScanParams
-**
-** Description      Set scan parameter used in BLE connection request
-**
-** Parameters:      scan_interval: scan interval
-**                  scan_window: scan window
-**
-** Returns          void
-**
-*******************************************************************************/
-void BTM_BleSetConnScanParams (UINT32 scan_interval, UINT32 scan_window)
-{
-#if SMP_INCLUDED == TRUE
-    tBTM_BLE_CB *p_ble_cb = &btm_cb.ble_ctr_cb;
-    BOOLEAN     new_param = FALSE;
-
-    if (BTM_BLE_ISVALID_PARAM(scan_interval, BTM_BLE_SCAN_INT_MIN, BTM_BLE_SCAN_INT_MAX) &&
-            BTM_BLE_ISVALID_PARAM(scan_window, BTM_BLE_SCAN_WIN_MIN, BTM_BLE_SCAN_WIN_MAX)) {
-        if (p_ble_cb->scan_int != scan_interval) {
-            p_ble_cb->scan_int = scan_interval;
-            new_param = TRUE;
-        }
-
-        if (p_ble_cb->scan_win != scan_window) {
-            p_ble_cb->scan_win = scan_window;
-            new_param = TRUE;
-        }
-#if (tGATT_BG_CONN_DEV == TRUE)
-        if (new_param && p_ble_cb->conn_state == BLE_BG_CONN) {
-            btm_ble_suspend_bg_conn();
-        }
-#endif // #if (tGATT_BG_CONN_DEV == TRUE)
-    } else {
-        BTM_TRACE_ERROR("Illegal Connection Scan Parameters");
-    }
-#endif
-}
-#endif // #if (BLE_HOST_CONN_SCAN_PARAM_EN == TRUE)
-
 /********************************************************
 **
 ** Function         BTM_BleSetPrefConnParams