Introduction: Sports injury often occurs in sports teaching and training, which directly affects the performance of the human body function and the improvement of sports performance. Objective: To study the feasibility of improving the biorhythm in sports training injury. Methods: 120 young athletes who are engaged in track and field training in traditional track and field sports schools in Liaoning Province are taken as the research objects. The effective data of the time and types of sports injuries, and the birth date, month and date of the injured athletes during training from 2005 to 2006 were collected. Results: Results show that in the relationship between human body three rhythm and the athlete's sports injury, the probability of sports injury in triple height is smaller; regarding the biological rhythm in one or more than one period or critical period, the damage probability is 95%, showing that most athletes sports injuries occur at a low and critical period stage. Conclusions: The arrangement of sports training must be adapted to the original biological rhythm of the human body, and the corresponding monthly cycle training plan should be made according to changes that occur in athletes’ physical cycles to avoid injury during training. Level of evidence II; Therapeutic studies - investigation of treatment results.