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 f6817785d9..c7cc7ed318 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_act.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_act.c
@@ -1242,54 +1242,6 @@ void bta_dm_add_device (tBTA_DM_MSG *p_data)
     }
 }
 
-#if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-/*******************************************************************************
-**
-** Function         bta_dm_close_acl
-**
-** Description      This function forces to close the connection to a remote device
-**                  and optionally remove the device from security database if
-**                  required.
-****
-*******************************************************************************/
-void bta_dm_close_acl(tBTA_DM_MSG *p_data)
-{
-    tBTA_DM_API_REMOVE_ACL *p_remove_acl = &p_data->remove_acl;
-    UINT8   index;
-
-    APPL_TRACE_DEBUG("bta_dm_close_acl");
-
-    if (BTM_IsAclConnectionUp(p_remove_acl->bd_addr, p_remove_acl->transport)) {
-        for (index = 0; index < bta_dm_cb.device_list.count; index ++) {
-            if (!bdcmp( bta_dm_cb.device_list.peer_device[index].peer_bdaddr, p_remove_acl->bd_addr)) {
-                break;
-            }
-        }
-        if (index != bta_dm_cb.device_list.count) {
-            if (p_remove_acl->remove_dev) {
-                bta_dm_cb.device_list.peer_device[index].remove_dev_pending = TRUE;
-            }
-        } else {
-            APPL_TRACE_ERROR("unknown device, remove ACL failed");
-        }
-        /* Disconnect the ACL link */
-        btm_remove_acl(p_remove_acl->bd_addr, p_remove_acl->transport);
-    }
-    /* if to remove the device from security database ? do it now */
-    else if (p_remove_acl->remove_dev) {
-        if (!BTM_SecDeleteDevice(p_remove_acl->bd_addr, p_remove_acl->transport)) {
-            APPL_TRACE_ERROR("delete device from security database failed.");
-        }
-#if (BLE_INCLUDED == TRUE && GATTC_INCLUDED == TRUE)
-        /* need to remove all pending background connection if any */
-        BTA_GATTC_CancelOpen(0, p_remove_acl->bd_addr, FALSE);
-#endif
-    }
-    /* otherwise, no action needed */
-
-}
-#endif // #if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-
 /*******************************************************************************
 **
 ** Function         bta_dm_bond
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 1dc86e925c..68c3dfb059 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_api.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_api.c
@@ -2195,40 +2195,6 @@ void BTA_DmSetEncryption(BD_ADDR bd_addr, tBTA_TRANSPORT transport, tBTA_DM_ENCR
 }
 #endif  ///SMP_INCLUDED == TRUE
 
-#if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-/*******************************************************************************
-**
-** Function         BTA_DmCloseACL
-**
-** Description      This function force to close an ACL connection and remove the
-**                  device from the security database list of known devices.
-**
-** Parameters:      bd_addr       - Address of the peer device
-**                  remove_dev    - remove device or not after link down
-**
-** Returns          void
-**
-*******************************************************************************/
-void BTA_DmCloseACL(BD_ADDR bd_addr, BOOLEAN remove_dev, tBTA_TRANSPORT transport)
-{
-    tBTA_DM_API_REMOVE_ACL   *p_msg;
-
-    APPL_TRACE_API("BTA_DmCloseACL");
-
-    if ((p_msg = (tBTA_DM_API_REMOVE_ACL *) osi_malloc(sizeof(tBTA_DM_API_REMOVE_ACL))) != NULL) {
-        memset(p_msg, 0, sizeof(tBTA_DM_API_REMOVE_ACL));
-
-        p_msg->hdr.event = BTA_DM_API_REMOVE_ACL_EVT;
-
-        memcpy(p_msg->bd_addr, bd_addr, BD_ADDR_LEN);
-        p_msg->remove_dev      = remove_dev;
-        p_msg->transport       = transport;
-
-        bta_sys_sendmsg(p_msg);
-    }
-}
-#endif // #if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-
 #if BLE_INCLUDED == TRUE
 
 #if (BLE_42_SCAN_EN == 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 3a3a383852..407f595408 100644
--- a/components/bt/host/bluedroid/bta/dm/bta_dm_main.c
+++ b/components/bt/host/bluedroid/bta/dm/bta_dm_main.c
@@ -94,9 +94,6 @@ const tBTA_DM_ACTION bta_dm_action[BTA_DM_MAX_EVT] = {
 #endif // #if (CLASSIC_BT_INCLUDED == TRUE)
     bta_dm_acl_change,                      /* BTA_DM_ACL_CHANGE_EVT */
     bta_dm_add_device,                      /* BTA_DM_API_ADD_DEVICE_EVT */
-#if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-    bta_dm_close_acl,                       /* BTA_DM_API_REMOVE_ACL_EVT */
-#endif // #if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
 #if (SMP_INCLUDED == TRUE)
     /* security API events */
     bta_dm_bond,                            /* BTA_DM_API_BOND_EVT */
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 e53ddf4192..42760f79de 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
@@ -80,9 +80,6 @@ enum {
 
     BTA_DM_ACL_CHANGE_EVT,
     BTA_DM_API_ADD_DEVICE_EVT,
-#if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-    BTA_DM_API_REMOVE_ACL_EVT,
-#endif // #if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
 #if (SMP_INCLUDED == TRUE)
     /* security API events */
     BTA_DM_API_BOND_EVT,
@@ -1215,17 +1212,6 @@ typedef struct {
 
 #endif /* BLE_INCLUDED */
 
-#if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-/* data type for BTA_DM_API_REMOVE_ACL_EVT */
-typedef struct {
-    BT_HDR      hdr;
-    BD_ADDR     bd_addr;
-    BOOLEAN     remove_dev;
-    tBTA_TRANSPORT transport;
-
-} tBTA_DM_API_REMOVE_ACL;
-#endif // #if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-
 typedef struct {
     BT_HDR      hdr;
     BD_ADDR     bd_addr;
@@ -1798,10 +1784,6 @@ typedef union {
     tBTA_DM_API_BLE_SET_CSA_SUPPORT ble_set_csa_support;
     tBTA_DM_API_BLE_SET_VENDOR_EVT_MASK ble_set_vendor_evt_mask;
 #endif
-#if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-    tBTA_DM_API_REMOVE_ACL              remove_acl;
-#endif // #if (BLE_HOST_REMOVE_AN_ACL_EN == TRUE)
-
 #if (BLE_FEAT_ISO_EN == TRUE)
 #if (BLE_FEAT_ISO_BIG_BROCASTER_EN == TRUE)
     tBTA_DM_API_BIG_CREATE              big_creat;
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 9cbed01197..d14d0ced9f 100644
--- a/components/bt/host/bluedroid/common/include/common/bt_target.h
+++ b/components/bt/host/bluedroid/common/include/common/bt_target.h
@@ -1618,10 +1618,6 @@
 #define BLE_INCLUDED            FALSE
 #endif
 
-#ifndef BLE_HOST_REMOVE_AN_ACL_EN
-#define BLE_HOST_REMOVE_AN_ACL_EN                  FALSE
-#endif
-
 #ifndef BLE_HOST_READ_TX_POWER_EN
 #define BLE_HOST_READ_TX_POWER_EN                  FALSE
 #endif