This study examines on badminton players following anterior cruciate ligament (ACL) surgery. It analyses the risk factors in badminton that may cause re-injury to the knee joint, such as sports postures and exercise intensity. Scientific and reasonable sports protection measures and training plans are formulated, including correcting sports postures and reasonably controlling exercise intensity and frequency. Rehabilitation training is carried out in stages, and the training intensity and frequency are gradually adjusted according to the recovery situation. Through scientific protection and training, the risk of re-injury to athletes can be reduced, and they can be helped to restore their best sports conditions. At the same time, future research directions are prospected, covering personalized rehabilitation programs, application of new technologies, and research on psychological factors.