The present invention discloses a router forwarding method which comprises the following procedure: Obtain the global route forwarding messages of the grouping forwarding date and appoint the external interface of the grouping forwarding date according to the global route forwarding messages. Inquire the mapping relation of the external interface and the tag to obtain the tag of the grouping date. Package the grouping date by the tag and send the grouping date to the external interface of the grouping forwarding date according to the route forwarding messages. The present invention also discloses a router. Using the present invention the internal routing problem in the router can be solved, which can avoid the packet loss caused by the wrong router or the routing black hole. The present invention improves the robustness of the system and reduces the routing recovering time.