An uplink resource determining method, an uplink resource indication method, a terminal, and a network device are disclosed. The method includes: receiving first DCI used to schedule transmission of a PUSCH on a target BWP, where the first DCI includes an allocation field for frequency domain resource allocation, the allocation field is determined based on a configuration of a reference BWP, and the allocation field includes first bits; and determining an uplink resource indicated by the allocation field, where the uplink resource is an uplink resource determined based on valid bits of the first bits; and a resource allocation type of at least one of the reference BWP and the target BWP is interlace resource allocation.