The first step, conservative treatment: 1, health education: to explain the relevant knowledge to patients with osteoarthritis of the knee joint, improve patients’ awareness of risk factors, promote a healthy lifestyle, teach patients to protect the knee joint to raise, lose weight and other good lifestyle in the KOA treatment is increasingly important, walking and swimming and other exercises are not only effective for patients with mild to moderate osteoarthritis of the knee, but also for patients with severe Also effective. 2. Protective measures for the joints: appropriate rest, weight loss, prevention of excessive joint movement and excessive weight bearing, avoidance of mechanical injury, and wearing of knee pads. 3. Medication: Acute attacks with severe symptoms should be treated with medication. For example, the Chinese medicine formula Jinhuang Paste, which uses raw earth, rehmannia, astragalus, codonopsis, hyssop, peach kernel, myrrh, etc., is used to tonify the liver and kidneys, invigorate blood circulation, resolve blood stasis, reduce swelling and relieve pain. The method is to take it internally and wash it externally, i.e. decoct it twice and then mix it, and take it twice in the morning and evening. The dregs of the medicine are put into a bag and then decocted once more and then washed or applied externally to the affected area. Topical medication can be used such as Furtalin, anti-inflammatory and pain relief cream. 4, functional exercise: quadriceps exercise: sitting or supine position, leg extension hook foot, alternate upward leg lift, 10-15 minutes each time, 2-3 times a day. 5.Physiotherapy and others: selective use of Chinese herbal medicine ion introduction, infrared physiotherapy, and computerized intermediate frequency treatment should be applied according to the individual. Physiotherapy is prohibited during the period of joint swelling and fever, and cold compresses are applied to reduce inflammatory congestion and edema. Second stage, minimally invasive surgery: Arthroscopic surgery is a minimally invasive surgery. Since it does not require incision of the joint and thus has less injury, faster recovery, better results and fewer complications, most knee surgeries can now be performed arthroscopically. 1.Minimally invasive arthroscopic surgery: osteoarthritis of the knee combined with joint free bodies, meniscal injuries, intra-articular fractures, intra-articular z-band (crossed z-band) injuries, patellar deviation (lateral patellar hypertension syndrome), synovial folds, soft tissue striae, etc. can be treated by arthroscopic surgery. 2, intra-articular drug injection: commonly used drugs are sodium hyaluronate, ozone, and chitosan, which can promote the inflammation to subside and relieve symptoms. 3, joint cavity irrigation: the debris and inflammatory substances in the joint cavity are removed. Third step, surgery: If the condition is particularly serious, with a large number of bone spurs, narrowing of the joint space, deformity, severe dysfunction, affecting life and work, and if long-term non-surgical treatment is ineffective, surgery may also be considered. It can be completely cured by artificial knee surface replacement; osteotomy orthopedic surgery is feasible for younger patients with simple knee inversion and valgus.