This application provides a signal transmission method, a network device, and a terminal device. The method includes: generating, by a network device, a first signal, where the first signal is used to indicate to a terminal device that there is or there is no paging scheduling information on a first paging occasion; determining, by the network device, a first resource based on at least one of a paging configuration parameter, a first parameter set, a terminal device identifier, or a terminal identification code; and sending, by the network device, the first signal to the terminal device on the first resource. The signal transmission method, network device, and terminal device in the embodiments of this application enable the terminal device to determine, based on the first signal, whether to listen on a downlink control channel, reducing power consumption of the terminal device.