The application belongs to the technical field of pet instruments, in particular to a pet foot washer. The washer comprises a drive assembly and a cleaning bucket with a cleaning space; the drive assembly comprises a drive part, a wave transmission component, an installation block, an output shaft, a first drive pin and a second drive pin; a first end face and a second end face of the wave transmission component are both wave surfaces, the drive part is installed on the installation block, an output end of the drive part is connected with the wave transmission component, the wave transmission component is connected with the cleaning bucket through the output shaft; the first drive pin and the second drive pin are both rotatably installed on the installation block, and the wave transmission component is installed between the first drive pin and the second drive pin.