Objective:To observe the effect of micro decoction pieces of modified Heidihuang decoction on renal fibrosis rats caused by unilateral ureteral obstruction (UUO).Methods:Rat fibrosis models were established through unilateral ureteral obstruction,then those rats were randomly divided into blank group,sham group,model control group,micro decoction pieces group,Niaoduqing group,with 10 in each group.The micro decoction pieces of modified Heidihuang decoction and Niaoduqing granules dissolved in 4ml distilled water were respectively administered intragastrically to rats in micro decoction pieces ...