The utility model provides a jar cleaning machine comprising a frame, a motor, a retaining plate, a rail, a control system and a jar support, wherein the motor is fixed at the bottom of the frame; the retaining plate is fixed on the left end of the upper part of the frame; the jar support is mounted inside the rail of the frame; a cleaning device and a flushing tube are arranged in the retaining plate. The jar cleaning machine can resolve the problem that the inner portion of the jar can not be totally cleaned caused by the limited opening of the jar, which improves working efficiency and can be operated by few workers, and can make more workers can do other works.