1. Autologous and allogeneic material reconstruction Because it takes more than 1 year for the ligament to be reconstructed, it is easy to rupture or loosen in the early stage, so it is not advisable to carry out early full activities, especially the activities of the knee joint, but to carry out muscle training under the fixation of plaster or restricted brace in the straight position, and only after 3 weeks to carry out joint flexion and extension exercises under the protection of adjustable brace, 4 weeks to carry out activities in the range of 0° to 90°, 6 to 8 weeks Return to normal. After surgery, a brace should be worn for 6 weeks for protection, and the affected limb can be partially weight-bearing under the protection of the brace. When the patient is able to walk normally, he/she can start to exercise fixed bicycle and lower limb muscle strength recovery. Running and jumping exercises can be started 3 months after surgery, simple sports can be resumed 6 months after surgery, and confrontational sports can be basically resumed 1 year after surgery. In order to protect the reconstructed tendon, the rehabilitation process is slowed down and the quality of life is relatively low within one year after surgery, but a more satisfactory quality of life can be obtained after one year. 2.LARS artificial ligament reconstruction Because the stability of the joint can be restored immediately after surgery, the early activities do not affect the wound healing and ligament stability, patients can carry out early muscle strength training with joint mobility training, gradually increase the training amplitude and intensity, 2 weeks later to support the abductor to bear weight on the ground, and quickly restore the preoperative functional state, 1 month after surgery to remove the abductor, 3 months after surgery can resume simple sports, 6 months after surgery can resume antagonistic sports. In the first month after the operation, the patient can resume simple sports in 3 months after the operation, and in 6 months after the operation, the patient can resume antagonistic sports, and can quickly integrate into work life and favorite sports again, which greatly improves the quality of life.