Objective:Through the Yishen pills for chronic renal failure (CKD2~4) clinical retrospective study, evaluation of Yishen pills for the treatment of chronic renal failure ( CKD2 ~4 ) clinical efficacy and safety. Methods:In June 2012 ~March 2014, the First Affiliated Hospital of Hunan University of TCM Renal medical inpatient and outpatient accept Yishen pill treatment of patients with chronic renal failure (CKD2~4) as the research object, respectively to observe Yishen pill group and control group in the treatment of chronic renal failure (CKD2~4) clinical efficacy, TCM syndrome indicators, an...