This invented technology is used in cooperative communication system, which fully utilizes multi-user diversity gain to make up the performance loss brought with cooperative spending to reduce time delay and increase cooperation efficiency, in which, a relay node merges and processes to received data flows and sends them to multiple users, each one eliminates its own information from the merged information to get information of other users so as to reduce the transfer time occupied by transferring data to multiple target nodes one by one or other channel resources and brings with diversity gain.