our different successional plots were set up in Menglun of Xishuangbanna in 1989 ,thetotal area was 2500m￣2. Insects were collected in the same way(800 nets for every plot). Thedominance, homegeneity, stability and diversity of the insects community were analysed. They were compared one another in different plots. Four plots shared samilar characteristicsin annual change. The number of insects in rain season is more than that in dry season. Inearly successional stage, the insect dominance in the rain sea...