diff --git a/components/bt/host/bluedroid/api/include/api/esp_gap_bt_api.h b/components/bt/host/bluedroid/api/include/api/esp_gap_bt_api.h
index 9f3d46b22a..98133f0003 100644
--- a/components/bt/host/bluedroid/api/include/api/esp_gap_bt_api.h
+++ b/components/bt/host/bluedroid/api/include/api/esp_gap_bt_api.h
@@ -226,6 +226,16 @@ typedef enum {
     ESP_BT_GAP_DISCOVERY_STARTED,                   /*!< Device discovery started */
 } esp_bt_gap_discovery_state_t;
 
+/// Type of link key
+#define ESP_BT_LINK_KEY_COMB                (0x00)  /*!< Combination Key */
+#define ESP_BT_LINK_KEY_DBG_COMB            (0x03)  /*!< Debug Combination Key */
+#define ESP_BT_LINK_KEY_UNAUTHED_COMB_P192  (0x04)  /*!< Unauthenticated Combination Key generated from P-192 */
+#define ESP_BT_LINK_KEY_AUTHED_COMB_P192    (0x05)  /*!< Authenticated Combination Key generated from P-192 */
+#define ESP_BT_LINK_KEY_CHG_COMB            (0x06)  /*!< Changed Combination Key */
+#define ESP_BT_LINK_KEY_UNAUTHED_COMB_P256  (0x07)  /*!< Unauthenticated Combination Key generated from P-256 */
+#define ESP_BT_LINK_KEY_AUTHED_COMB_P256    (0x08)  /*!< Authenticated Combination Key generated from P-256 */
+typedef uint8_t esp_bt_link_key_type_t;
+
 /// BT GAP callback events
 typedef enum {
     ESP_BT_GAP_DISC_RES_EVT = 0,                    /*!< Device discovery result event */
@@ -331,6 +341,7 @@ typedef union {
     struct auth_cmpl_param {
         esp_bd_addr_t bda;                     /*!< remote bluetooth device address*/
         esp_bt_status_t stat;                  /*!< authentication complete status */
+        esp_bt_link_key_type_t lk_type;        /*!< type of link key generated */
         uint8_t device_name[ESP_BT_GAP_MAX_BDNAME_LEN + 1]; /*!< device name */
     } auth_cmpl;                               /*!< authentication complete parameter struct */
 
diff --git a/components/bt/host/bluedroid/btc/core/btc_dm.c b/components/bt/host/bluedroid/btc/core/btc_dm.c
index 408ffb9efd..e386083411 100644
--- a/components/bt/host/bluedroid/btc/core/btc_dm.c
+++ b/components/bt/host/bluedroid/btc/core/btc_dm.c
@@ -413,6 +413,7 @@ static void btc_dm_auth_cmpl_evt (tBTA_DM_AUTH_CMPL *p_auth_cmpl)
     msg->pid = BTC_PID_GAP_BT;
     msg->act = BTC_GAP_BT_AUTH_CMPL_EVT;
     param.auth_cmpl.stat = status;
+    param.auth_cmpl.lk_type = p_auth_cmpl->key_type;
     memcpy(param.auth_cmpl.bda, p_auth_cmpl->bd_addr, ESP_BD_ADDR_LEN);
     memcpy(param.auth_cmpl.device_name, p_auth_cmpl->bd_name, ESP_BT_GAP_MAX_BDNAME_LEN + 1);
     memcpy(msg->arg, &param, sizeof(esp_bt_gap_cb_param_t));
diff --git a/examples/bluetooth/bluedroid/classic_bt/a2dp_sink/main/main.c b/examples/bluetooth/bluedroid/classic_bt/a2dp_sink/main/main.c
index a140507146..46fdb76e53 100644
--- a/examples/bluetooth/bluedroid/classic_bt/a2dp_sink/main/main.c
+++ b/examples/bluetooth/bluedroid/classic_bt/a2dp_sink/main/main.c
@@ -59,6 +59,7 @@ static void bt_app_gap_cb(esp_bt_gap_cb_event_t event, esp_bt_gap_cb_param_t *pa
         } else {
             ESP_LOGE(BT_AV_TAG, "authentication failed, status: %d", param->auth_cmpl.stat);
         }
+        ESP_LOGI(BT_AV_TAG, "link key type of current link is: %d", param->auth_cmpl.lk_type);
         break;
     }