The present invention relates to a method and a device for load balancing between sectors The method comprises the steps of: obtaining a load value of a source sector; when the load value of the source sector is larger than a first load threshold, obtaining load values of all the first cooperation sectors of the source sector; and if the load values of all the first cooperation sectors are smallerthan a second load threshold, increasing a downward inclination angle of a base antenna of the source sector, and reducing downward inclination angles of base antennas of all the first cooperation sectors to achieve load balancing between the sectors, wherein the first load threshold is larger than the second load threshold. According to the technical scheme provided by the embodiment of the invention, the downward inclination angle of the base antenna is regulated to control the covering range of the base, the regulation mode is simple and convenient, load balancing between the sectors is achieved, the spectrum resource utilization rate of each sector is improved, and the system service quality is improved.