A method for updating a connection relationship of a wireless relay station, comprises the following steps of: (a) a wireless relay station RS1 already connecting to a wireless communication network group comprising a base station and wireless relay stations subjected to the base station, and if determining that the connection relationship of RS1 needs to be changed, selecting a target node; (b) instructing RS1 to update the connection to the target node, and after receiving the instructions, RS1 starting a connection update, establishing a wireless link to a new node and releasing no longer used resource in an existing data tunnel. The present invention can fulfill the update of the connection relationship of a wireless relay station, and can take steps to further guarantee the service suspension time of the terminals and RSs subjected to the wireless relay station is the shortest.