The nutritional value of yam is mainly due to its ability to provide the body with nutrients such as energy and carbohydrates needed for daily functioning. Yam is a common food and the main nutrients contained in it are carbohydrates, crude fiber, potassium and copper. Each 100 grams of yam contains 57 calories, 12.4 grams of carbohydrates, 1.9 grams of protein, 0.2 grams of fat, vitamin A3IU, vitamin C5 mg, 16 mg of calcium. Daily moderate consumption of yam has a certain nutritional value for the organism. However, due to the low protein content of yam, so in the consumption of yam at the same time moderate consumption of some protein-rich foods such as beef, chicken, etc. can ensure a comprehensive and balanced intake of nutrients, is conducive to maintaining the normal physiological function of the body. In addition, it is not recommended to eat too much yam, so as not to cause digestive disorders.