Objective To investigate the dietary nutrition status of adolescent cyclists in Jiangsu Province during the training period from 2018 to 2021， and to clarify whether there is a problem of insufficient nutrient intake among adolescent cyclists during the training period， further provide evidence for relevant departments to take timely intervention measures.Methods A total of 1 100 adolescent cyclists in Jiangsu Province from 2018 to 2021 were selected as the survey subjects to investigate and analyze the dietary structure of adolescent athletes during training. A total of 1 086 valid questionnaires were returned.Results The actual energy intake of the 1 086 adolescent athletes basically reached more than 80% of the energy requirement （EER）； the energy provided by fat per day for adolescent athletes was lower than the recommended intake （25%-30%）， and the energy provided by carbohydrates per day was 64.72%， both within the recommended range （55%-65%）. There was insufficient water intake per day， and the average daily dietary fiber intake （10.23 g） was lower than the recommended amount （25-30 g）； except for male athletes， who have higher intake of niacin than the recommended amount， the intake of other vitamins is lower than the recommended amount. In terms of dietary structure， eggs， cereals and their products are well-intake， which can meet the recommended intake requirements， while livestock meat， dairy products， vegetables and beans are all insufficiently ingested， and fruit， potato， aquatic products， poultry and other foods are seriously insufficiently ingested. The energy supply ratio of breakfast and lunch is within the recommended intake range， but the energy supply ratio of dinner is higher.Conclusion There are insufficient intake of energy and nutrients in adolescent cyclists in Jiangsu Province， which cannot meet the needs of athletes during training. There is also an unreasonable dietary structure， with insufficient intake of livestock meat， dairy products， vegetables， beans， fruits， and aquatic products. At the same time， the long-term high intake of dinner is not conducive to the athletes’ own athletic ability and normal training. It is suggested that nutrition education for athletes， managers， and chefs should be strengthened， and the dietary structure of athletes should be appropriately adjusted to improve their dietary behavior and ensure their nutritional and health needs， laying the foundation for improving sports performance.