Objective： To observe the clinical effect of the external application of orthopedics fomentation for knee osteoarthritis of blood stasis type.Methods：Divided 60 cases of patients with knee osteoarthritis of blood stasis type into two groups randomly，30 cases in each group.The treatment group was treated with external app lication of orthopedics fomentation，while the controlgroup was treated with externalapp lication of an appropriate amount of voltaren ointment.The treatment of both groups lasted for three weeks.After treatment，statistically analyzed the clinical effect in the two groups and compared the changes of the visual analogue scale(VAS)and scores of the Western Ontario and Mc Master Universities Osteoarthritis Index(WOMAC).Results：The total effective rate was 86.7%in the treatment group and was 80.0%in the controlgroup，there being no significance in the difference(P ＞ 0.05).After treatment，scores of VAS and WOMAC in the two groups were decreased when compared with those before treatment( P ＜0.05， P ＜0.01).The score of WOMAC in the treatment group decreased more significantly than that in the control group( P ＜0.05).Conclusion：The external application of orthopedics fomentation for knee osteoarthritis of blood stasis type can effectively reduce the scores of VAS and WOMAC of patients，which has good clinicaleffect.