A method of transmitting, by a user equipment (UE), a physical uplink shared channel (PUSCH) in a wireless communication system is disclosed. The method comprises receiving configuration information related to the PUSCH, receiving downlink control information (DCI) scheduling the PUSCH, and transmitting the PUSCH based on the DCI. The DCI includes a specific field. Based on that the specific field represents at least one SRS resource related to a simultaneous transmission across multi-panel (ST×MP), the PUSCH is transmitted based on a plurality of panels.