A study on the diversity of Orchids from Southern East Viet Nam was carried out in 2019 and 2020 and identified 173 species, 50 genera, accounting for 1.28% of the total number of orchid species available in Viet Nam (897 species). Among them, all species were used as ornamental plants; 13 species were used for medicinal herbs; and 5 species were listed for conservation in Vietnam Red Data Book, Part II, Plants (2007). The life forms of Orchids were divided into groups including (1) epiphytes with 144 species, (2) terrestrials with 26 species, (3) saprophytes with 1 species, (4) lithophytes with 2 species. There are 60 species were added to the Southern East Viet Nam. Keywords: Diversity of orchidaceae, Southern East Vietnam