A slot consistency verification method is provided. The method is applied to a fine granularity service scenario, and includes: a sending end receives first information from a receiving end, where the first information indicates that a receiving slot used by the receiving end to receive a fine granularity service is consistent with a sending slot used by the sending end to send the fine granularity service; and the sending end sends a data block to the receiving end, where the data block includes a first basic frame overhead and a basic frame payload, the basic frame payload is for bearing the fine granularity service, and the fine granularity service is borne in the sending slot. According to the application, it is ensured that the sending slot used is consistent with the receiving slot, thereby ensuring normal running of the fine granularity service.