Abstract: Michelia angustioblonga is one of rare and endangered plants in China.The plants of this speies are mainly distributed in Maolan Nature Reserve of Guizhou province.Through survey,in Maolan Nature Reserve Michelia angustioblonga resource distribution is more dispersed and its number is scarce.There are four distribution points with the total of 10 plants.And three of them are newly-discovered distribution points.This species is in an extremely dangerous state.This paper analyzes its endangered factors. Through field investigation and sample contrast, its morphological description is complemented,thus laying a foundation for further study of this species.