The invention discloses an automatic dishwashing device and belongs to the technical field of dishwashing devices. The automatic dishwashing device comprises a washing pool, a drainage device and an ultrasonic transducer; a washing basket is arranged in the washing pool, the ultrasonic transducer is installed under the washing pool and is connected with an ultrasonic generator, the drainage deviceis connected to the lower side of the middle of the washing pool, and a water sensor is arranged on one side of the washing pool. By the aid of ultrasonic washing, the automatic dishwashing device ishigh in washing capability, high in washing automation degree, simple in operation, power saving and water saving, multifunctional, timesaving and laborsaving, good in dish color locking effect and capable of killing harmful bacteria, and dishes are still new after washing.