According to the processes of washing vegetable by man, we improved the experimental washer and manufactured the prototype machine. The field test were held in the vegetable production areas. The result of test showed that the washing capacity were 1,200 kg/hr for celery, 1,250 kg/hr for green onion, 1,500 kg/hr for green garlic respectively. When prototype machine was used to wash celery, the cleaned rate was 98% but damaged rate was under 1%. The similar condition for green garlic, cleaned rate was 95% but damaged rate still under 1%. The functions of prototype were definite by farmers, so this machine maybe developed to wash other vegetable, such as water convolvulus, edible amaranth and pak-choi, for raising the utilization.