Abstract: This article researched on soil seed bank of Ammopiptanthus by a combination way of quadrats survey, seed Identification, germination,to reveal the feature of soil seed bank and the relationship between the soil seed banks and population regeneration. The results show:The soil seed bank of Ammopiptanthus is relatively rich,the average density is 11seeds/m2; The seed mainly present on the soil surface,It is possible that there are some seeds in 0-2cm depth soil if crust exists,there is no seed below that; Seed germination rate and soil seed bank is negatively correlated,A place with high soil seed bank,but has low seed germination rate, This contradiction leads scarce seedling, and then Impacts the population regeneration of it.