In order to find out whether Beauveria bassianahad the continuous control effect on Asiatic corn borer in the natural conditions, the dead larvae caused by infection of B. bassiana were investigated in the towns of used and unused region of B. bassinan in western of Jilin Province. The results of investigation showed that control effect of B.bassinan parasitism were dominant in the area of investigation. The number and rate of white muscardine caused by B. bassiana had increased every year, and the number of natural enemies had been increasing each year. The results showed that B. bassiana had the continuous control effect on Asiatic corn borer in natural conditions, and the used region was better than the unused, the effect promoted by 4.2 times.