Objective:To observe the clinical effect of Qingjie Huayu Tang (QHT,清解化瘀汤)for children allergic purpura and prevention of renal damage. Mothods:68 cases were allocated to 2 groups randomly.The control group was treat- ed by routine western medicine,and the treatment group added with QHT.2 weeks constituted the course of treatment.Results:The total effective rate was 92.10% and 70.00% in treatment group and control group respectively(P<0.05),the time of disappearance of symptoms and signs,and the hospitalized time of treatment group were s...