Four different mung bean varieties were selected as material,i.e.,‘Bailv 9’（BL9）,‘Bailv 11’（BL11）,‘Dayinggelv 935’（BL935） and ’Dayinggelv 985’（BL985）.They were grown in the natural conditions and their physiological indexes at seedling,blossom and maturity were determined.Changes of indexes of three growth period were compared and resistant varieties screened.Obvious physiological indexes and growth period were also selected.The results showed that BL9 and BL11 show strong resistance.In the mung bean seedling growth stage super oxygen anion generated at the highest rate.The relative extravasation conductivity was the highest at blossom.SOD,POD,MDA,proline and soluble sugar content achieved the highest in the mature period.