Abstract: In Guangxi,Isoptera are widespread,and 133 species are nominated.This article deals with the ecogeography of termites in Guangxi,which includes natural woods,man-made woods and urban horticultural woods,We discovered that species composition,adaptability and effect to the environment of Isoptera differ in correspondence with different region,different height above sea level and different niche.Macrotermes barneyi Light,Odontotermes formosanus (Shirski),Microtermes dimorphus Tsai et Chen are adaptable-living population and major wood pest in the hill areas of middle subtropic,southern subtropic and northern tropic in Guangxi.Coptotermes formosanus Shiraki is the most harmful one among the harmful termites.Cryptotermes is distributed and does harm in the cities and towns of the South of the tropic of cancer in Guangxi and widespread especially in the southern-east coastal areas among them.