Scientists according to the level of nutrients contained in vegetables, they are divided into four categories A, B, C, D. Category A vegetables: rich in carotene, riboflavin, vitamin C, calcium, fiber, etc., high nutritional value, mainly cabbage, spinach, mustard, amaranth, leek, snow red, etc.. Category B vegetables: nutrition second to category A, usually divided into three kinds. The first contains riboflavin, including all fresh beans and bean sprouts; the second contains more carotene and vitamin C, including carrots, celery, onions, green garlic, tomatoes, peppers, sweet potatoes, etc.; the third category mainly contains vitamin C, including cabbage, cabbage, cauliflower, etc. Category C vegetables: containing less vitamin class, but high in calories, including yams, yams, taro, pumpkin, etc. D vegetables: contains a small amount of vitamin C, lower nutritional value, there are winter melon, bamboo shoots, eggplant, wild rice, etc.. Experts explained that the level of vegetable nutrition classification, obviously according to the nutrients contained in vegetables for comparison, experts introduced some scientific data for scientific research and is based on the nutritional needs of different people to develop a different vegetable diet, but not that good to eat more, bad to eat less, our nutrition is about balance, so for different levels of Vegetables we should have intake, so that the nutrition is the most balanced.