Proposed are a method for transmitting or receiving a physical downlink shared channel in a wireless communication system, and a device therefor. The method performed by a terminal may comprise the steps of: receiving an SS/PBCH block from a base station; on the basis of at least one of the frequency location of the SS/PBCH block and/or the frequency location of CORESET #0, determining a bandwidth for CORESET #0, receiving a PDCCH from the base station on CORESET #0 on the bandwidth; and receiving a PDSCH including system information on the basis of the PDCCH.