Abstract:The effects of illumination, temperature and soil miosture content on germination and longevity of Hopea hainanensis seeds were studied. The results indicated that the best temperature for seed germination was 15-20℃. The seeds treated under full dark and under light (2 800 lx for 14 h and dark for 10 h) showed no obvious difference in germination rate. Optimum soil moisture content for seed germination was 30%-50%. Seeds spread in the room at ambient temperature in May in South Yunnan for 14 days had only 20％ germination rate， and the germination ability was completely lost at the l8th day.