The wireless repeater is a co-frequency amplification device used for indoor and outdoor coverage in the communication network. It can effectively make up for the lack of base station coverage in the communication network. It can be widely used in parking lots, tunnels, offices of high-rise buildings, entertainment venues, elevators or private houses, remote suburbs and other signal blind areas that base station signals cannot reach, and at the same time, it is useful for eliminating the outdoor local signal shadow caused by the influence of high-rise buildings in the city The weak signal areas of individual villages and towns in rural areas or remote suburbs also have quite good coverage.