The present application provides a method and device for multiplexing uplink grant resources, including: determining, by a network device, control information, where the control information includes uplink grant resources information and multiplexing manner information, where the uplink grant resources information is used for indicating uplink grant resources configured by the network device for a terminal device, the multiplexing manner information is used for indicating a multiplexing manner of remaining uplink grant resources, and the remaining uplink grant resources are uplink grant resources in the uplink grant resources except a part of uplink grant resources used for carrying data in one or more logical channels corresponding to the uplink grant resources; and transmitting, by the network device, the control information to the terminal device. The method for multiplexing uplink grant resources of the present application can improve a use efficiency of uplink grant resources.