Abstract: A frequency band processing method and apparatus are provided. The method includes: obtaining, by a base station, CA capability information of a terminal; determining, by the base station based on the CA capability information, that an access frequency band of the terminal is to be switched from a primary frequency band to a secondary frequency band; and sending, by the base station, a switching instruction to the terminal, where the switching instruction is used to instruct the terminal to switch the access frequency band from the primary frequency band to the secondary frequency band. According to the method, after switching, the terminal can obtain a better frequency band combination and achieve a better CA effect, so that larger bandwidth can be obtained and user experience is improved.