Abstract: The mechanism of using ultrasound and air bubble to clean vegetable was analyzed and the vegetable cleaning tester was developed. The orthogonal test of vegetable cleaning was done in this tester and the optimum parameters of vegetable cleaning was discovered as follows: the ultrasonic power is 450 W, the air bubble's intensity is 25 m³/h and the cleaning time is 4 min. The washer of vegetable was developed on the basis of the optimum parameters. When the washer was used to clean leaf vegetable, the productivity, abluent ratio and breakage were over 120 kg per hour, more than 95% and less than 2%, respectively. When the washer was used to clean rhizome vegetable, the productivity, abluent ratio and breakage were over 240 kg per hour, more than 90% and less than 1%, respectively.