Anterior cruciate ligament rehabilitation is a gradual process, must not be blindly aggressive, not too lax, need to grasp a reasonable “degree”. The following is a list of some of the precautions in the rehabilitation process: 1, the use of braces: restrictive braces to protect the use of 2 months 2, walking with the help of crutches for 6 weeks, and just started to weight-bearing 4 weeks of the affected limb weight-bearing force is not more than 30% of the full weight-bearing. 3, ice: ice 15-30 minutes after the completion of rehabilitation training, 2 times a day; such as training, such as skin temperature is too high can increase the number of ice 2-3 times, each interval of 2-3 hours. 4, joint flexion training: training once a day in the morning, 15-20 minutes each time, 6 weeks flexion activity to reach 120 degrees, 3 months to return to the healthy side of the same; joint extension training: training once a day in the afternoon, 15-20 minutes each time. 5, review time: monthly review in the first 3 months after the operation, and every 3 months thereafter, postoperative review of the magnetic resonance in March, June, September, and December. 6.Pre-operative need to have a good understanding of the postoperative rehabilitation, before undergoing surgery need to carry out isometric training of the quadriceps muscle, while maintaining the knee joint in the straight position. 7, Straight leg raising exercises and joint flexion can be increased resistance training.