Abstract:Objective: To observe the impact of Sanjin tablet on the T lymphocyte subsets of the peripheral blood of female patients with recurrent urinary tract infection, to reveal the immune pharmacological mechanism of its prevention and treatment of the disease. Method: A randomized, controlled and open trial was adopted.The 68 patients were divided into treatment group(30 cases) and control group(28 cases). Two groups were both treated with conventional sensitive antibiotics, the treatment group took Sanjin tablet in addition. After bacteria in the urine were negative, the treatment group took maintenance therapy with Sanjin tablet for 3 months, the control group took appropriate low-dose antibiotics maintenance treatment for 3 months. The peripheral blood T lymphocyte levels before and after treatment, time from the initial treatment to the bacterial culture of urine was negative of the two groups, and the recurrence rate of urinary tract infection in 3 months after discontinuation of the two groups were observed. Result: After treatment, the CD3+, CD4+ T cells and CD4+/CD8+ in peripheral blood of the treatment group were enhanced compared with untreated and the control group(P＜0.05).Time from the initial treatment to the bacterial was negative and the recurrence rate of the treatment group were significantly better than the control group (P<0.01). Conclusion: Effective treatment with Sanjin tablet to the recurrent urinary tract infection of female patients will probablely through the mechanism of improving the cell-mediated immunity levels to achieve the effect of shortening the course of treatment and to reducing the recurrence rate.