A method for receiving, by a base station, a physical uplink shared channel (PUSCH) in a wireless communication system includes: transmitting a first message including information related to a configuration of a multi-TU PUSCH transmitted in a plurality of time units (TUs); transmitting a second message related to a spatial relation RS applied to the transmission of the multi-TU PUSCH; and receiving the multi-TU PUSCH. The plurality of time units (TUs) are classified into a plurality of TU groups, and the second message includes information indicating at least one spatial relation RS applied to each TU group among the plurality of TU groups.