Based on the analysis of species composition, amount and distribution of seeds,and species similarity. and its diversity, the properties of soil seed banks on 10 different land utilization systems in Hainan Province were studied. The 10 land utilization systems are Casuarina equisetifolia forest (12 years),Eucalyptus exserta forest (12 years),rubber plantation (40 years),tea tree plantation (28 years),sugarcane plantation, old-field (2 years abandoned dry field),shrub (8 years abandoned shifting cultivation),shifting cultivation (2 years),secondary forest and primeval tropical rain forest.Resuts showed that: A. The amount of seeds of xylophyta species decreased and that of herbaceous species increased with the increase in strength of land-use, while as the amount of seeds increased, the bio-diversity decreased.B. More than 50% species distributed randomly in these soil seed banks of 10 land utilization systems. C. Slash-and-burn cultivation caused not only soil and water loss, but also the degradation of quality and quantity of soil seed banks.