Early rehabilitation training, by moving the muscles and joints around the affected knee, can improve the blood circulation of the joint, reduce the congestion of the veins at the end of the bone adjacent to the joint, reduce the intraosseous pressure, and promote the absorption and dissipation of inflammation, which is conducive to the relief of pain and swelling. In addition, early rehabilitation can effectively prevent muscle atrophy as well as inhibit the uploading of nociceptive signals and relieve postoperative pain. Effective rehabilitation can strengthen the quadriceps muscle strength, increase the stability of the joint, avoid, reduce or delay joint degeneration, and improve the long-term efficacy of knee arthroscopy. Precautions: Arthroscopic surgery is minimally invasive and there may be postoperative discomfort such as fever and pain. Successful surgery is important but accounts for only 50%, the other 50% is dependent on the patient’s rehabilitation exercises. However, good function comes largely from timely and correct rehabilitative functional exercises. Therefore, postoperative functional exercises should be performed as early as possible under the guidance of the surgeon, overcoming fear, inertia and other negative emotions. 1. The methods and data provided in this program are formulated in accordance with the general routine, and the specific implementation should be completed under the doctor’s guidance depending on your own conditions and different surgical conditions. 2. A certain degree of pain is unavoidable during functional exercises. If the pain subsides to the original level within half an hour of stopping the exercise, it will not cause damage to the tissue and should be tolerated. 3, plyometric exercises should focus on practicing until the muscles are sore and fatigued, and then proceed to the next group after sufficient rest. The number of exercises, time and load depends on your own situation, and you should practice the healthy side at the same time. Good muscle strength is the key factor of joint stability, as well as good function of the knee joint to ensure that must be practiced seriously. 4, in addition to appropriate braking protection of the surgical limb, the rest of the body parts (such as the upper limb, waist and abdomen, the healthy side of the leg, etc.) should be practiced as much as possible to ensure the quality of the body, improve the overall circulation and metabolism, and promote the recovery of the surgical localization. 5, joint mobility (flexion, extension) exercises each time to strive to improve the angle. If there is no progress in the flexion angle for a long time (>2 weeks), there is a possibility of joint adhesion, so we should pay great attention to it and insist on completing the exercises. 6, the swelling of the joints will accompany the entire exercise process, swelling does not increase with the angle of the exercise and the increase in the amount of activity is a normal phenomenon, until the angle and muscle strength basically return to normal swelling will gradually subside. Sudden increase in swelling should be adjusted exercises, reduce the amount of activity, and in serious cases, should be followed up in time. Note: Rehabilitation exercises may aggravate the swelling of the lower limbs, so please lie down in a flat position with the lower limbs elevated when resting.