Abstract： Objective To discuss the clinical prevention effects of chinese medicine tea bag on calcium oxalate calculus with urinary passage.Methods Calcium oxalate calculus with urinary passage patients were told the differentiation of symptoms and signs for classification of syndrome,choosing humid heat model、qi-stagnancy and blood stasis model、renal deficiency model with 120 patients in each group.Every model was divided into the experiment group and the control group with 60 patients in each group.We examined the rate of calculus recidivation withsonography.the urine levels of calcium,phosphonium,uric acid,ethanedioic acid after six months and one years.Results The rate of calculus recidivation at 6 months:humid heat model:the experiment group 7.55%(4/53),the control group 16.33%(8/49);qi-stagnancy and blood stasis model:the experiment group 3.57%(2/56),the controlgroup 12.09%(7/58);renal deficiency model:the experiment group 4.26%(2/47),the control group 9.30%(4/43);the total rate of calculus recidivation of the experiment group was 5.13%,while the control group was 12.67%,it had statistical significance(x2=4.60,P＜0.05).The rate of calculus recidivation at 1 year:humid heat model:the experiment group 15.69%(8/51),the control group 28.26%(13/46);qi-stagnancy and blood stasis model:the experiment group 9.26%(5/54),the control group 20 69%(12/58);renal deficiency model:the experiment group 9.10%(4/44),the control group 23.69%(9/38);the total rate of calculus recidivation of the experiment group was 11.41%,while the control group was 23.94%,it had statistical significance(x2=7.90,P＜0.05).In same model,the experiment group were significantly more different than those in control group at same time point(t=3.32,3.96,2.23,2.96,5.05,2.56,3.44,3.74,3.03,3.85,3.01,3.86,P＜0.01,P＜0.05).Conclusion Chinese medicine had preventive effect on calcium oxalate calculus with urinary passage,which worth to further study.