The study of reef-buiding biont of the Late-Carboniferous in Southern Guizhou rely mainly on alga,such as phylloid-algal and siphonopore algal. In recent years, as what has been studied was deepened, we find some new-type reef-building beings. One of the most important beings are Ivanovia cf. manchurica colony-systlse coral. Observe through the field and office work, we argue that Ivanovia cf. manchurica were one important reef-building beings and generally developed well. In stratum of the Late-Carboniferous palaeoecological characteristic has obvious differences in different environments and the way grows to form the unique ecological type. It has four kinds of growth ways mainly, covering, twining, wrap up and isolated distribution. The ways and the types are determined whether to become reefs and become reef ways and scale of reef. Covering and twining types form more reef not uniform size while wrap up and free-standing types distribute scattered. The reef of Ivanovia cf. manchurica discovery and reef-building biological research enrich the Late-Carboniferous biont types. After the F/F, it offer typical instance and help the reef-building beings research deep to launch the Carboniferous period.