The invention provides a vegetable food preparation method. In the method, vegetables such as leaves, roots, melons, beans and herbs are used as raw materials, and sorted to be cleaned, peeled, cut, cooked, cooled, grinded, mixed, rolled, dried and packaged. The preparation method is characterized in that according to nutritional dietary balance, one type or types of leaves, roots, melons, beans and herbs vegetables are used as the raw material of vegetable food, the raw materials are sterilized and disinfected by ozone, and cooked and flavored, and then are dried by an infrared drier to obtain a vegetable food with good color, flavor and taste. The vegetable food is convenient in eating, is hygiene and nutrition.