Synovitis of the knee joint is a common disease in middle-aged and elderly people, and is mostly treated with joint cavity fluid aspiration and hormonal drug injection therapy. In order to improve the efficacy, 197 patients have been treated with comparative observation since 2001, and satisfactory results were obtained. Clinical data and methods There were 197 cases in this group. There were 51 male cases and 146 female cases, aged 30-86 years, with onset time of 1 day-30 years. The main manifestations were recurrent swelling and pain around the patellar joint of the knee, thin and shiny skin, no change in skin color, generally no obvious local fever, and different degrees of limitation in walking, standing, sitting, lying and squatting. X-rays, CT and MRI may show joint effusion with or without joint osteophytes and widened joint space. In cases of meniscal damage, the joint space may not be widened or may be narrowed. The ESR is often increased in laboratory tests. The diagnosis was confirmed by reference to the diagnostic criteria for knee synovitis in the “Practical Rheumatology of Chinese Medicine and Western Medicine”. Tumor, tuberculosis and septic infection were excluded. Comprehensive treatment group 150 cases (manipulation, external application of decongestant cream, and introduction of Chinese herbal medicine) Technique: “Shao’s technique”, a technique created by Dr. Shao Fuyuan, the chief physician, was used. According to the location and degree of swelling, the patient was placed in supine, prone and lateral positions. According to the nature of different tissue lesions, such as swelling, thickening and striae, different techniques such as pointing, pressing, kneading, holding, pinching and plucking are used. For example, for both sides of the suprapatellar area, a light pushing and kneading technique is used, and for the post-N striae, a plucking technique is used. Once a day, for 30 min each time, 10 times as a course of treatment. Decongestant ointment for external use: Decongestant ointment is prepared by Phellodendron, Atractylodes, musk, etc. It is applied to the affected area, fixed with gauze, and removed before and applied after the daily manipulation. Each time the medicine is changed, warm salt water is applied and washed for 10-20 min. 10 times is a course of treatment. Chinese medicine DC low voltage introduction: through manipulation, decongestant cream external application for about a week, synovial swelling obviously reduced, floating patella test turned negative, and then treated with Chinese medicine DC low voltage introduction. The Chinese medicine is made of 18 kinds of Chinese medicines such as cinnamon stick, safflower, myrrh, hyssop, atractylodes, etc., which are applied to the affected area in 15x20cm2 size packs, plus DC low voltage, each time for 40 minutes, once a day, 10 times as a course of treatment. When Chinese herbal medicine was introduced, the technique could continue to be used, while the decongestant cream was stopped. Control group 47 cases Method: According to the degree of effusion, after the appropriate amount of joint cavity effusion was withdrawn, 10-25 ml of prednisolone acetate with 4 ml of 2% procaine hydrochloride was used for joint cavity injection and pressure bandaging. Once a week with strict asepsis. Usually 2-3 treatments are needed. In both methods, patients are advised not to strain or get cold, to walk and stand as little as possible, and to rest in bed moderately. (1) Cured: swelling and pain are eliminated, ESR is normalized, and joint function is restored to normal; (2) Significantly effective: swelling and pain are significantly reduced, ESR is significantly decreased, joint function is basically normal, and general activities can be performed; (3) Improved: joint swelling and pain are reduced, ESR is decreased, and joint function is mildly restricted; (4) Ineffective: joint swelling, pain, function and ESR are not significantly improved before and after treatment. ESR did not improve significantly. Treatment results: 91 cases (60.67%) were cured, 32 cases (21.33%) were effective, 14 cases (9.33%) were improved, and 13 cases (8.67%) were ineffective in the comprehensive group; the total effective rate was 91.33%. In the control group, 12 cases (25.53%) were cured, 11 cases (23.40%) were effective, 9 cases (19.15%) were improved, and 15 cases (31.91%) were invalid; the total effective rate was 68.08%.