Abstract: In order to provide excellent Fraxinus species for landscaping, timber forest, economic forest and water source conservation forest, etc., the author not only systematically studied the genus germplasm resources and variety breeding, but also carried out an investigation on the introduction and acclimatization of species resources of the genus in Henan. In addition, the author tentatively put forward Henan Fraxinus classification system in this paper. The research results showed that the classification system of the genus was: genus, subgenus, group, subgroup, species, subspecies, varieties; this genus was divided into 2 subgenera, 5 groups, 2 subgroups, 18 species, 1 subspecies, 6 varieties, including 2 new record subgenus, 5 new record group, 1 new subgroup, 5 new record species, 1 new record subspecies, 2 new record varieties，2 varieties and 2 new varieties. At the same time, the author also described the main use and excellent properties of the genus and so on.