The present disclosure relates to inter-cell beam coordination scheduling methods and related devices. One example inter-cell beam coordination scheduling method includes receiving, by a first wireless access device serving a coordinated cell, a coordination scheduling request specific to an edge user terminal of a serving cell, where the coordination scheduling request carries an indication of a downlink narrow-transmission beam set DX1, and the downlink narrow-transmission beam set DX1 is a downlink narrow-transmission beam set that satisfies a principle of minimal interference and that is determined by the edge user terminal through beam training, and in a slot in which downlink scheduling is performed on the edge user terminal in the serving cell, preferably using, by the first wireless access device, a narrow-transmission beam in the downlink narrow-transmission beam set DX1 to schedule a camping user terminal of the coordinated cell in downlink.