This study is based on the relationship between the training methods and influencing factors of high school aerobics athletes' competitive ability, laying a foundation for improving the competitive ability of aerobics athletes. The results show that the improvement of aerobics athletes' training methods in training, such as Training goals and plans, Training content and methods, Training intensity and quantification, Training cycle and rhythm, Coaching team and support system, and Cultivation of athletes' psychological quality, all contribute to the improvement of competitive ability, thereby improving the sports performance of aerobics athletes. Through descriptive correlation design and SPSS analysis of 65 students' data, it was found that aerobics athletes' interest in high-dimensional competitive ability, including Technical level, Physical fitness, Artistic expression, Mental quality, Spirit of teamwork and Training goals and plans, Training content and methods, Training intensity and quantification, Training cycle and rhythm, Coaching team and support system, Cultivation of athletes' psychological quality in training methods, etc. In order to improve the competitive ability and training method level of aerobics athletes, teachers should take relevant measures in teaching, such as not considering sex, grade, and training years as the main factors for evaluating the competitive ability and training methods of aerobics athletes, emphasizing the actual content of course design and the organization of teachers, helping aerobics athletes to establish a good training method system and improve the development level of aerobics competitive ability.