In this article, the developing theory of guild in ecology is applied to study on the guild structure of grasshopper community in the grassland of west Jilin prvince. This grasshopper community consisted of 13 species of grasshopper. The cluster analysis and principal components analysis were made on the basis of foraging behavior and habitat choice as indicators to divide this grasshopper community into four guilds.They were Euchorthippus unicolor, Oxya chinensis, "the guild of perching on the surface of e...