This disclosure provides a channel multiplexing method, a channel multiplexing apparatus and a communication device, and pertains to the field of wireless communication technology. The channel multiplexing method includes: determining whether uplink channels having different priorities are allowed to be multiplexed for transmission in case that the uplink channels overlap in a time domain; in case that it is determined that the multiplexing transmission of the uplink channels is allowed, determining that the uplink channels need to meet a predetermined timeline; and in case that it is determined that the multiplexing transmission of the uplink channels is not allowed, determining that the uplink channels do not need to meet the predetermined timeline.