Method and system for resetting media access control protocol layer of user terminal

The invention disclose a method for resetting a media access control protocol layer of a user terminal, comprising the following steps of: acquiring hybrid automatic repeat request (HARQ) entity resetting indication by using a high-layer protocol layer of the media access control (MAC) protocol layer; judging whether the HARQ entity resetting triggers MAC entity resetting or not by using the high-layer protocol layer, if so, sending a MAC entity resetting triggering instruction to an MAC protocol layer, and then executing MAC entity resetting operation by using the MAC protocol layer; and if not so, sending a HARQ entity resetting triggering instruction to the MAC protocol layer, and then executing the HARQ entity resetting operation of corresponding HARQ entities by the MAC protocol layer. The invention also discloses a system for resetting a media access control protocol layer of a user terminal, comprising a judging unit and an executing unit. The method and system in the invention can pertinently realize the resetting of one ore more HARQ entities.