The invention discloses a fault diagnosis method of the load sector link in a base station equipment. The load sector link comprises a forward load sector link, when fault diagnosis is performed to the forward load sector link, at least a high level and at least a low level are sent to a destination module of the load sector link by a load sector link source module in the forward load sector link, and if the level received by the destination module of the load sector link is identical with the level sent by the load sector link source module, and the forward load sector link is normal; if not, the forward load sector link is broken. The fault diagnosis to the load sector link is realized by using the transmission testing sequence adopted between the load sector link source module and the destination module of the load sector link. The method has the advantages that the production debugging cycle of the base station equipment is shortened, the testing flow is simplified, and the equipment productivity is enhanced; the major quality hidden trouble existing in the equipment is avoided, and the maintenance cost of the equipment is reduced; and the problem that the failure module and the load sector can not be precisely positioned is solved.