Abstract: The longevity of seed is the timeline that seed can maintain vitality. Research has been done on the Ceratoides arborescens seeds＇ longevity and the results showed that the Ceratoides arborescens seeds enter into germination climax in 48 h （3 days） under 25 ℃ isothermal and sufficient soil water conditions. The germination is fast and concentrative, full seedling can be reached in 4-5 days under the field sowing condition. The Ceratoides arborescens seeds＇ longevity can last more than 3 years under the general inventory conditions.