The cruciate ligament includes the anterior cruciate ligament and the posterior cruciate ligament, and the healing time of the ligament is about three months. Patients are advised not to engage in strenuous sports, especially running and jumping, stopping and turning, etc., for three months to avoid damage to the reconstructed ligament. Three months after the rupture of the cruciate ligament, the healing strength of the ligament basically meets the requirements of sports, and the patient can perform slower and lighter sports exercises and gradually increase the volume and intensity of sports. Patients can return to daily training in about six months; then high level sports exercises to rebuild the knee joint with high level sports ability.