通过对光肩星天牛的天敌种类调查和自然死亡率调查研究，从死亡的幼虫、蛹的虫体中分离出３６个细菌菌株。经致病力测定和再分离，筛选出寄生率在３０％以上的８个菌株，又经生物学特性测定和鉴别，得到７种病原细菌。并且找到了光肩星天牛自然死亡的原因。为预测预报和防治以及光肩星天牛是否成灾提供理论参数。 Thirty-six strains of bacteria were isolated from dead larvae and pupae by studying the species of natural enemies of Anoplophora glabripennis and the natural mortality study. After pathogenicity determination and re-isolation, eight strains with the parasitism rate above 30% were screened, and seven kinds of pathogenic bacteria were obtained through biological characteristics determination and identification. And found the natural death of the light shoulders horned beetle. Provide theoretical parameters for forecasting and controlling as well as whether Atrachia tabacum catastrophe.