The invention relates to a processing device, in particular to a washboard processing device. The washboard processing device can save manpower and improve the working efficiency during operation. Thewashboard processing device comprises a bottom plate, a circular shell, a swing plate, a double-shaft motor, a roller cutter, a reciprocating device and a guiding device, wherein a guide plate is connected with one side of the bottom plate, the circular shell is connected to one side of the top of the bottom plate, the swing plate is rotationally connected to the middle of the top of the circularshell, the double-shaft motor is mounted at the top of the swing plate, the roller cutter is rotationally connected to the tail end of the bottom of the swing plate, the roller cutter is in transmission connection with one output shaft of the double-shaft motor, the reciprocating device is arranged between the circular shell and the swing plate, and the guiding device is arranged between the circular shell and the swing plate. According to the washboard processing device, a washboard is grooved through cooperation of the reciprocating device and the roller cutter, so that the effect of processing the washboard is achieved.