Embodiments of the present invention provide a method for maintaining a time advance timer, a base station and terminal equipment. The method for maintaining a time advance timer comprises: judging by a base station whether a band to be uplink adjusted includes only the band where a primary cell is located; and transmitting by the base station a time advance command to the band where the primary cell is located if the band where the primary cell is located is only included, such that the time advance timer to which the band where the primary cell is located corresponds is restarted. The advantages of the embodiments exist in that by processing time advance timers by the base station or the terminal, the time advance timer to which the band where the PCell is located corresponds expires at last, thereby preventing interruption of communications of the terminal due to advanced expiration of the time advance timer to which the band where the PCell is located corresponds.