Conclusion:The control efficiency to Diamondback moth of 10 billion spores/ml empedobacter brevis GXW15-4 pesticide is better, the control efficiency after 7 days of 800 ~ 1000 times of empedobacter brevis GXW15-4 pesticide is between 75% to 82%.It is best to use the 900~1000 times of empedobacter brevis GXW15-4 pesticide.using the floor level concentration when the Younger Age Diamondback moth is more while using the superior limit concentration when Insect age is miscellaneous and advanced age Diamondback moth is more.