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Objective:To observe the clinical therapeutic effect of Ba-He technique of acupuncture in the treatment of knee osteoarthritis. Methods: A total of 90 cases of knee osteoarthritis were evenly randomized into Ba-He technique group (observation group) and common technique group (control group), with 45 cases in each group. Zusanli (足三里 ST 36), Heding (鹤顶 EX-LE 2) and Dubi (犊鼻 ST 35) were punctured respectively in Ba-He technique and common technique in the two groups. The therapeutic effects of the two groups were compared after one course of treatment (10 sessions) in accordance with Japanese assessment criteria for knee-joint functions. Results: Aftertreatment, among the 74 and 71 affected knees in the observation and control groups, the therapeutic effect was excellent in 42 (56.8%) and 26 (36.6%) knees, fine in 14 (18.9%) and 20 (28.2%), OK in 10 (13.5%) and 11 (15.5%), and poor in 8 (10.8%) and 14 (19.7%) respectively. The therapeutic effect of the observation group was significantly better than that of control group (P