A communication method, a terminal device and a network device are provided. The communication method includes: receiving, by a terminal device, a first physical downlink control channel sent by a network device in a first time domain scheduling unit, wherein the first physical downlink control channel is used for scheduling a physical downlink data channel in at least one time domain scheduling unit before the first time domain scheduling unit; and receiving, by the terminal device, data corresponding to the first physical downlink control channel in the at least one time domain scheduling unit according to the first physical downlink control channel.