The invention discloses an interference positioning method of a base station side array antenna system. The data transmission of a base station and a user are periodically closed, meanwhile interference information is received, a base station side interference direction is determined by using a DOA method, a user reports the received interference power to the base station, so that an interferencelocation area and power are calculated according to the joint judgment of the base station and the interference information received by the user, by adoption of the method, the interference location area can be effectively positioned without adding an additional test device or performing manual investigation, thereby reducing the manpower and material resources, and the interference location areaand the transmitting power can be effectively positioned; and the method for positioning the interference location has low algorithm complexity and is suitable for a communication system of a base station side array antenna.