Embodiments of the present invention provide a signal processing method and device. The method comprises: performing PDCCH monitoring on one or more first DL BWPs in an unlicensed frequency band; andobtaining DL BWP related information or UL BWP related information from the PDCCH. The embodiments of the present invention can solve the problem that network equipment and terminal equipment are inconsistent in understanding of UL BWP and DL BWP on an unlicensed frequency band.