diff --git a/components/bt/host/bluedroid/stack/l2cap/l2c_link.c b/components/bt/host/bluedroid/stack/l2cap/l2c_link.c
index 22360ac84..960c455d8 100644
--- a/components/bt/host/bluedroid/stack/l2cap/l2c_link.c
+++ b/components/bt/host/bluedroid/stack/l2cap/l2c_link.c
@@ -1131,6 +1131,12 @@ void l2c_link_check_send_pkts (tL2C_LCB *p_lcb, tL2C_CCB *p_ccb, BT_HDR *p_buf)
             while ((l2cb.controller_xmit_window != 0) && (p_lcb->sent_not_acked < p_lcb->link_xmit_quota))
 #endif
             {
+                //need check flag: partial_segment_being_sent
+                if ( (p_lcb->partial_segment_being_sent)
+                        || (p_lcb->link_state != LST_CONNECTED)
+                        || (L2C_LINK_CHECK_POWER_MODE (p_lcb)) ) {
+                    break;
+                }
                 //L2CAP_TRACE_DEBUG("l2cu_get_next_buffer_to_send = %p",l2cu_get_next_buffer_to_send(p_lcb));
                 if ((p_buf = l2cu_get_next_buffer_to_send (p_lcb)) == NULL) {
                     break;