The present invention discloses a method of beacon synchronization for base stations, which comprises the following steps: receiving or transmitting a beacon by a first base station or a second base station; scanning at least one channel by the second base station to search for a channel of the first base station; calculating a time difference between the beacon sent by the first base station and the beacon sent by the second base station; and adjusting a time of transmitting the beacon sent by the second base station to synchronize the beacon sent by the second base station with the beacon sent by the first base station. Wherein, a wireless signal of the second base station is interfered by the first base station.