China's dietetic science is rich in content, the core of which is his unique dietetic thought and the food structure influenced by it. In the aspect of diet thought, China's philosophy pays attention to the coexistence of qi and existence, forming the characteristics of the unity of man and nature, and emphasizes the overall function and fuzziness in cultural spirit and way of thinking, which makes China people have a unique concept in diet science, that is, the ecological view of correspondence between man and nature, and China people have a unique diet view in diet science, that is, the ecological view of correspondence between man and nature, the nutritional view of dietotherapy and the harmonious diet view of five flavors. It emphasizes the harmonious unity of diet and nature, the harmonious unity of eating health and aesthetics, and pays attention to the harmonious beauty of color, aroma, taste, shape, utensils and nutrition of catering, which not only meets people's physiological needs, but also meets people's psychological needs. Starting from these dietary concepts, China people chose a dietary structure of "five grains for nourishment, five fruits for help, five livestock for benefit and five vegetables for supplement". Long-term historical practice has proved that this structure is scientific and reasonable and beneficial to human health.