In our department, 58 cases of 60 knees with fibroadhesive stiffness of the knee joint were treated with minimally invasive release surgery from October 1999 to June 2005, and the results were more satisfactory. 1. Clinical data 1.1 Object Of the 58 cases of 60 knees, 30 were male and 28 were female; age ranged from 17 to 56 years, with an average of 40.5 years. There were 23 cases of postoperative lower middle femoral fracture, 19 cases of postoperative tibial plateau fracture, 11 cases of rheumatoid arthritis (one of which was bilateral knee), and 5 cases of post-arthroscopic surgery (one of which was bilateral knee). The medical history ranged from March to November, with a mean of 4.5 months. Knee extension and flexion ranges (degrees) at admission: 0°→5°6 knees, 0°→30°12 knees, 5°→50°19 knees, 5°→70°23 knees. The patient was placed in the supine position for lumbar anesthesia, and the balloon band was used to stop bleeding. cavity. (2) Extra-articular capsule release: through the arthroscopic incision, use blunt tip, stripper, scissors and other instruments to release the adhesions outside the joint capsule of the rectus femoris, middle femoral muscle, medial and lateral femoral muscles, medial and lateral collateral ligaments and medial and lateral patellar support bands. During the operation, attention was paid to the extent of release to prevent injury to the ligaments and important neurovascular vessels. It is required to complete intraoperative knee flexion of 100° to 120°, not less than 95°. Postoperatively, the knee joint was compressively bandaged, and joint flexion and extension (CPM) exercises were performed the next day. Postoperative bed walking was performed 3 to 4 days after surgery.