The ratio between animal meat, eggs, dairy and plant food cereals, vegetables and fruits must be appropriate. 2, to achieve the coarse and fine collocation of staple foods, such as the ratio between coarse and fine grains should also be appropriate, to provide the body with rich dietary fiber, in the prevention of chronic metabolic diseases will be very obvious. The role of dietary fiber in the prevention of chronic metabolic diseases will be very obvious. 3, to achieve color matching, different colors of food which contains a certain difference in the type and amount of nutrients, only different colors of food together, can be a good supplement to the body of a variety of nutrients.