The invention provides a signal processing method and device. According to the method and the device, an analog to digital conversion module carries out analog to digital conversion on an intermediatefrequency signal received by an antenna, thereby obtaining a digital signal; and a digital intermediate frequency processing module carries out filtering and rate matching on the digital signal, thereby obtaining a processed signal; and the processed signal is sent to a DSP module. According to the method and the device, the digital intermediate frequency filtering can be realized, so the problemthat no digital intermediate frequency filtering exists in the prior art is solved.