300 one-day-old Avian chicks were randomly divided into four groups and feed on diets as follows:control diet(Mo 13 mg·kg-1) and high molybdenum(Mo) diets(Mo 500 mg·kg-1,high molybdenum group Ⅰ;Mo 1 000 mg·kg-1,high molybdenum group Ⅱ;Mo 1 500 mg·kg-1,high molybdenum group Ⅲ) for 42 days,examining the effect of dietary high molybdenum on pathologic lesions in kidney of broilers.Compared with those of control group,the renal tubule epithelial cells showed swelling,granular degeneration and vacuolar degenerat...