According to the requirements of leaf integrity, low damage and order in the cleaning process of whole-leaf vegetables, a washer was designed by integrating the cleaning power of air-bubble and water-jets. The cleaning process was determined, and the whole structure of the washer was designed. In view of difficulties in cleaning, such as leaves adhesion and floating in water, the basket was designed to vibrate and up-and-down motion periodically in order to simulate the manual cleaning process. The key components were designed, such as the rinse tank and filter, bubble generator and water jet, and the automatic operation of the equipment was realized. The computational fluid dynamics simulation was carried out for the air jet pipeline, and the distribution of gas phase at different air flow rates was studied, and the air flow rate range was determined as 2~ 8m/s, and the selection of air pump was guided. The simulation of different pipelines with different diameters of air-jet hole and different hole spacings was done at air flow rate of 6m/s. The gas phase distribution uniformity was used as the evaluation index, and the optimal pipeline parameters were got as air-jet hole diameter was 8mm and hole spacing was 50mm.Taking the whole spinach as the cleaning material, the washing weight, cleaning time and intensity of airflow were selected as factors which had three levels respectively, and a blank column was set at the same time for the four-factor and three-level orthogonal experiment. The damage rate and cleaning rate were used as evaluation indexes in cleaning test, and the comprehensive evaluation index was calculated according to the weight of damage rate and cleaning rate which accounted for 0.5. Orthogonal experimental analysis and variance analysis were performed. The test results showed that washing weight, cleaning time and intensity of airflow have signifcant influences on cleaning rate and damage rate of spinach, and the optimum cleaning parameters of spinach were obtained as washing weight was 4kg, cleaning time was 120s, and the intensity of airflow was 5m/s.