The invention discloses a plate washing machine capable of cyclically washing a net plate. The plate washing machine comprises a plate washing machine body. The plate washing machine body comprises a cleaning device, a rotating device, a circulating device, a liquid collecting tank and oscillating devices. The cleaning device is arranged on the top of the plate washing machine body, the net plate is arranged on the lower side of the cleaning device, and the oscillating devices are arranged on the two side walls of the plate washing machine body. The oscillating devices comprise oscillators, oscillator cavities and ultrasonic generators, the oscillator cavities are formed in the two sides of the plate washing machine body, the multiple oscillators are arranged in the oscillator cavities, and the ultrasonic generators are arranged on the tops of the oscillator cavities. The liquid collecting tank is arranged at the bottom of the plate washing machine body, the bottom of the liquid collecting tank is connected with the circulating device through a pipeline, and the circulating device is connected with the cleaning device. Through the cooperation of the arranged cleaning device and circulating device, the structure is simple, cleaning fluid can be cyclically used, the cost for washing the net plate is reduced, and resources are saved.