A data multiplexing apparatus, comprising: a memory that stores a plurality of instructions; and a processor coupled to the memory and configured to execute the instructions to: for a logical channel that needs to perform data multiplexing, determine one or more physical layer resources, for multiplexing data, from a plurality of physical layer resources supported by the logical channel according to priorities of the plurality of physical layer resources; wherein, the logical channel supports to multiplex data of different service types onto the plurality of physical layer resources, and the priorities of the plurality of physical layer resources are indicated by scheduling information for the physical layer resources transmitted by a network device; and multiplex the data of the logical channel onto the determined physical layer resources, wherein the scheduling information is downlink control information in a physical downlink control channel transmitted by the network device, the priorities of each physical layer resource being indicated by the downlink control information, and wherein a priority field is added in the downlink control information to indicate the priorities of the physical layer resources. a memory that stores a plurality of instructions; and a processor coupled to the memory and configured to execute the instructions to: for a logical channel that needs to perform data multiplexing, determine one or more physical layer resources, for multiplexing data, from a plurality of physical layer resources supported by the logical channel according to priorities of the plurality of physical layer resources; wherein, the logical channel supports to multiplex data of different service types onto the plurality of physical layer resources, and the priorities of the plurality of physical layer resources are indicated by scheduling information for the physical layer resources transmitted by a network device; and multiplex the data of the logical channel onto the determined physical layer resources, wherein the scheduling information is downlink control information in a physical downlink control channel transmitted by the network device, the priorities of each physical layer resource being indicated by the downlink control information, and wherein a priority field is added in the downlink control information to indicate the priorities of the physical layer resources. for a logical channel that needs to perform data multiplexing, determine one or more physical layer resources, for multiplexing data, from a plurality of physical layer resources supported by the logical channel according to priorities of the plurality of physical layer resources; wherein, the logical channel supports to multiplex data of different service types onto the plurality of physical layer resources, and the priorities of the plurality of physical layer resources are indicated by scheduling information for the physical layer resources transmitted by a network device; and multiplex the data of the logical channel onto the determined physical layer resources, wherein the scheduling information is downlink control information in a physical downlink control channel transmitted by the network device, the priorities of each physical layer resource being indicated by the downlink control information, and wherein a priority field is added in the downlink control information to indicate the priorities of the physical layer resources.