Abstract: Investigation on insects’ communities and dynamics was implemented in Phyllostachys praecox cv. prevernalis stands of Songyang, Zhejiang province from 2010 to 2011. 4978 specimen were collected, and 207 species of 94 families of 19 orders were identified. Analysis on insect community structure demonstrated that Lepidoptera occupied the largest number of species in the community, followed by Coleoptera. Diversity of arthropod community showed obvious seasonal change. Relative abundance, diversity and dominance decreased in winter and summer, peaked in May. From the view of functional groups, herbivorous insects were dominant by species and individual number, followed by predatory insects and spiders, and the last was neutral insects. Herbivorous insects had many species, but no one was dominant, neutral insects were dominated by Culididae and Tipulidae. Predators included spiders and predatory insects.