【Objective】 The effects of Lespedeza davurica extractive(LDE) on growth performance and antioxidant indices of broiler chickens were discussed.【Method】 A total of 350 1-day healthy Avian broilers of commercial strains were randomly assigned to seven treatments with five replicates.The experimental stage was forty-two days.The control group(CK) was fed basal diet,group 1 to 3 fed basal diet supplemented with 20,30,40 mg/kg of ethyl acetate extractive of LDE,group 4 to 6 fed basal diet supplemented with 40,50...