This work is a part of insect community concerning grassland soil ecosystem on the meadow of entire horse in plateau regions in Menyuan, Chinghai. It's altitude is 3,200 metres. The average temperature in a year is about 0℃, so that the climate is cold. The dominant plants in this area are Cyperaceae. and Grami-neae. The organic materials in soil are rich. The first part of investigation is reported in this paper.The soil insects include 7 orders, 27 families, and 66 genera or species, and other invertebrat...