A communication method, a terminal device and a network device are provided. The method includes: a terminal device receives first indication information sent by a network device, wherein the first indication information is used for scheduling first uplink transmission of the terminal device; the terminal device receives a physical-layer signaling sent by the network device, wherein the physical-layer signaling is used for instructing the terminal device to abandon or suspend the first uplink transmission, or the physical-layer signaling is used for modifying a configuration parameter of the first uplink transmission; and the terminal device performs processing on the first uplink transmission according to the physical-layer signaling.