Abstract: Objective: To explore the effects of arthroscopic debridement combined with radio frequency energy in the treatment of knee osteoarthritis.Methods: Forty-eight patients with knee osteoarthritis were randomly divided into the radio frequency group and traditional apparatus group(24 cases each group),which were treated with arthroscope combined with radio frequency and arthroscopic traditional apparatus,respectively.The preoperative and postoperative 1-year Lysholm score and joint effusion quantity at 2 weeks after operation between two groups were compared.Results: The difference of preoperative Lysholm score in two groups was not statistically significant(P >0.05).The postoperative Lysholm scores in two groups were significantly higher than that in preoperation(P< 0.01).The difference of postperative 1-year Lysholm score in two groups was statistically significant(P< 0.01).The joint effusion quantity at 2 weeks after operation in radio frequency group was less than in that in traditional apparatus group(P< 0.01).Conclusions: The radio frequency energy can effectively improve the outcome of the arthroscopic debridement in the treatment of knee osteoarthritis,which is worth to recommend.