Abstract: Beauveria bassiana , is entomopathogenic fungi which applied the most widely presently in China .But the effect is slow and unsteady when it is used for protecting plant from insects in large scope .There are some difficulties in industrialization , standardization and formulation .So , the authors describe the current research situation of Beauveria bassiana about its pesticidal mechanism on three sides :ten phases of infecting course ; function of protease , chitinase , lipase , amylase , etc ;toxins , such as TF1 , TF2 , beauvericin , oosporin , tenellin related to pesticidal effect .The matters of strains degenerate easily and preparations lack of stabilization during storage are summed up .On the basis of these , the authors bring forward the prospects of how to improve pesticidal effects of Beauveria bassiana from enzyme , toxin , strain , production technology and formulation .There are some main measures:obtaining fine strains with active enzyme ;cloning genes of toxins with molecular biological technology , then breeding by genetic transformation ;further research on mechanism of strains degeneration on virulence;improvement and control on reactor of fermentation ;advancing stabilization during storage of preparation , and so on .[ Ch , 53 ref .]