本文研究了大豆田５种主要食叶害虫的生态位。在时间方面：生态位宽度指数以大豆小夜蛾最高（０．６０１５）；生态位重叠指数以大豆小夜蛾对银纹夜蛾最高（０．１０８１）；生态位相似性比例指数以大豆小夜蛾对豆天蛾最高（０．７７１６）。在空间方面：生态位宽度指数以棉铃虫最高（０．９９０４）；生态位重叠指数以棉铃虫对大豆小夜蛾最高（０．１２３３）；生态位相似性比例指数以棉铃虫对大豆小夜蛾最高（０．８８７０）。应用生态位概念分析了各种群发生的数量特征 This article studies the niche of five major leaf-eating pests in soybean field. In terms of time: the index of niche breadth was the highest (0.6015) in the soybean (Soybean); the niche overlap index (Soybean) was the highest (0.1081) in S. litura; the proportion index of niche similarity was Soybean The moths were the highest (0.7716) against the moths. In terms of space, the index of niche breadth was the highest (0.9904), the index of niche overlap was the highest (0.1233) for Helicoverpa armigera, the ratio index of niche similarity was Moths were the highest (0.8870). Based on the concept of niche, the quantitative characteristics of each population were analyzed