In order to research on the method for athletes to improve the training effect through a reasonable diet, the influence of nutrition intervention measures on athletes' nutrition intake and body composition is studied in this paper. In this research, 179 high-temperature training athletes were supplemented with nutritional interventions such as vitamins, minerals, collagen, and energy. Prospective observations of thermal energy and three major nutrient intakes before and after the intervention showed that the levels of carbohydrates and protein after the intervention were higher than before the intervention. The fat level decreased; after the intervention, the athletes' sugar, salt, water supply and sweating were higher than before the intervention, and their body fat percentage decreased. It shows that nutrition intervention based on athletes and environmental characteristics can improve athletes' energy utilization and appetite, and help improve training results. Key words: Nutrition, Acid Metabolites, Body Fat, Balanced Diet