The investigation of arthropod community was conducted in soybean field of South District in Changchun,Jilin province.There were 213 species of arthropod captured by sweep net and ground sample,which included 98 species of natural enemy,63 species of pest and 52 species of neutral insect.The abundance,diversity and evenness were used to analyze temporal pattern of arthropod community.The results showed that arthropod community experienced developing stage,culminate stage and decline stage during whole soybean growth period,and the abundance and diversity of community were obviously decreased by spraying of highly toxic pesticide.Ecological regulation technique of controlling pests in soybean field was also discussed in the paper.