Abstract: In order to understand the fauna of Pentatomomorpha in Xichou county, using route survey and net sweeping, the insects of Pentatomomorpha were collected, and the species were identified and fauna analysis was carried out. The results showed that insects of Pentatomomorpha in Xichou county included 106 species of 67 genera and 13 families. Among them, the most species were Pentatomidae, with 31 species, followed by Coreidae, with 29 species. In fauna of world, most species markedly presented the characters of oriental realm, but with some in Palaearctic realm, 25.47% species of all presented the characters of Oriental-Palaearctic realm and a few species presented the characters of other realms. In fauna of China, the species were distributed in Southwest-China and South-China, Southwest-China and South-China and Central-China were the main components, the second was in Southwest-China and South-China and Central-China and north-China, with 27, 27, 11 species, accounting for 25.47%, 25.47% and 10.38% of all, respectively. The fauna of insect Pentatomomorpha in Xichou county markedly presented characters of Oriental realm, Southwest-China, South-China sub-region and obvious characteristics of Central-China.

Key words: Pentatomomorpha, fauna, Xichou county, Yunnan province