After arthroscopic surgery for meniscus injuries, it usually takes about 8 weeks of rehabilitation to return to normal, but within these 8 weeks, there is a need for staged and planned rehabilitation exercises to promote recovery. There are three stages of rehabilitation: the first stage is within 1-7 days after surgery, in this stage, the main purpose is to support the wound, reduce soft tissue swelling, relieve pain, and at the same time to avoid bed-ridden complications, through the isometric contraction of the quadriceps muscle and ankle extension and flexion training, which on the one hand, can promote the venous return, reduce the swelling of the soft tissues, and on the other hand, can prevent venous thrombosis. This can promote venous return and reduce soft tissue swelling on the one hand, and prevent venous thrombosis on the other. The second stage is generally 1-3 weeks after the operation, this stage can focus on practicing the extension and flexion activities of the joints, through the straight leg raising test, straight leg raising and knee extension and flexion exercises, in the process of practicing anti-inflammatory and analgesic drugs as well as ice packs can be applied to relieve the pain, and at the same time you can help the walker to practice squatting, or hips exercises. The third stage is in the postoperative period of 4-8 weeks, you can carry out more intense functional exercises, such as walking, walking quickly under the protection of a walker, squatting movements, generally through these rehabilitation training to 8 weeks later you can carry out normal physical exercise.