Food is the most important thing for the people, and safety is the most important thing for food. This is a sentence left by Premier Wen when inspecting Shuanghui. Grains and sundries are the basis of people's survival, but insufficient nutrition will lead to slow intelligence and growth, and various functions of the body will not be nourished by energy; However, overeating will lead to excess nutrition, increase the burden of internal organs, breed various diseases and affect life span. Therefore, reasonable diet is the long-term way for public health. This ppt explains in detail how to carry out reasonable meal matching with 16 slides.