Embodiments of this application disclose a retransmission processing method and apparatus. The method includes: sending, by a master base station, instruction information to a first secondary base station, where the instruction information is used to instruct the first secondary base station to send feedback information to the master base station after the first secondary base station sends data to user equipment; receiving, by the master base station, the feedback information sent by the first secondary base station according to the instruction information; and performing, by the master base station, retransmission processing on the data according to the feedback information.