Knee osteoarthropathy is a common disease among middle-aged and elderly people, which is mainly characterized by knee pain and dysfunction. The gradual popularization of arthroscopic technology meets the requirements of such patients to improve their quality of life. Preoperative diagnosis and intraoperative operation are the key to solving knee pain, but the recovery of postoperative joint function has not yet attracted sufficient attention. The so-called function refers to the necessary conditions and ability to maintain daily life and carry out work, study, labor and social activities. The author observed the recovery of 75 patients after arthroscopic knee osteoarthropathy, and found that if not combined with active and reasonable rehabilitation medical treatment, not only is it difficult to obtain satisfactory therapeutic effect of the original joint injuries and diseases, but also tends to combine with the joint adhesion, stiffness, contracture and muscular atrophy after surgery, and sometimes even aggravate the original symptoms and dysfunctions of the joints. Therefore, it is necessary to put forward several methods and points of attention to help knee joint function recovery after knee arthroscopy for the reference of colleagues. After arthroscopy, patients should be placed in supine position, and should be lifted gently to minimize unnecessary joint activities, and the back of calf should be padded with pillow to elevate the affected limb, and pay attention to the pillow not to be piled up at N fossa, so as not to compress the veins at N fossa to affect the reflux; pay attention to the observation of the peripheral blood flow of the affected limb and the dorsalis pedis arterial pulsation; pay attention to the observation of the swelling of the whole lower limb, to find out whether there is any obstacle of venous reflux, and to find out venous embolism in time. Timely detection of venous embolism. Within 7 days after surgery, the knee joint should be fixed with elastic bandage to reduce the swelling of the joint; according to the swelling of the joint, shorten or lengthen the time of external fixation of the elastic bandage appropriately; the patient should not remove the elastic bandage by himself. Because the swelling of the joints is heavy within 3 days after the operation, the patient can try to go to bed on the first day after the operation, and then go down to the ground at a later date according to the swelling and pain of the joints. Ensure that the postoperative wound dressing is changed once a day or once every other day. 2, the treatment of postoperative joint swelling knee osteoarthropathy operation mainly synovial folds of cleaning and stripping the articular cartilage surface scraping, combined with a large meniscus injury patients will be performed meniscectomy. In some patients, due to the synovial fold hypertrophy, extensive adhesions, or rheumatoid arthritis synovial lesions are more serious, during the operation to do a large area of cleaning, the corresponding synovial fold vascular hemorrhage caused by joint swelling. Three days after the operation, if the swelling of the joint is still very obvious, even the skin color is bright, the floating patella test is positive, the joint is distended and painful, and there is no tendency for the swelling to subside, then we can consider performing the puncture of the joint cavity, suctioning the intra-articular fluid, and continue to use the elastic bandage with pressure bandage. A few days later, the puncture can be performed again, generally 2 times after the puncture swelling can be basically controlled. After aspiration, the affected limb should be kept in an elevated position for 3-5 days, and no knee flexion exercise should be performed. 3, the flexible use of postoperative massage techniques Joint dysfunction is a common problem after surgery, many patients can not do knee flexion and extension exercise due to preoperative pain, thus bringing certain difficulties to the postoperative practice, joint capsule tension, ligament muscle contracture is the biggest obstacle to the practice of kung fu. Therefore, the solution of postoperative dysfunction, especially the recovery of knee flexion function, is the key to determine the effectiveness of the surgery. Most of the problems of knee dysfunction can be solved with the help of the doctor’s purposeful manipulation along with your own exercise.