The invention relates to a lobster cleaning machine, which is suitable for cleaning aquatic products, vegetables, and fruits, especially for lobsters, crabs, screws, and shells. The lobster cleaning machine can also be used to remove pesticide residues from vegetables and fruits. The lobster cleaning machine comprises a shell, a cover plate, a cleaning tank, a water nozzle, an ultrasonic vibration box, ultrasonic energy transducers, a supersonic wave generator, a self-priming pump, a water tank, an electromagnetic valve, and a stainless steel centrifugal pump. The cleaning tank is arranged in the upper part of the shell. The ultrasonic vibration box is arranged in the lower part of the shell. An isolation net is arranged in the gap between the ultrasonic vibration box and the cleaning tank. Multiple ultrasonic energy transducers are arranged on the lower part of an energy transducer plate arranged in the inner side of the ultrasonic vibration box. The cover plate is arranged in the upper part of the shell. A water jet pipe and the water nozzle are arranged on the lower part of the cover plate. The water jet pipe and the water nozzle are connected. A base is arranged on the bottom of the shell. One side of the base is provided with the ultrasonic wave generator. The water tank is arranged on one side of the base. The self-priming pump is arranged in the water tank. The stainless steel centrifugal pump is arranged on the base. When the washing is completed, the wastewater is discharged from the washing tank immediately.