Taking the Potentilla acaulis community in the upstream of Shiyang River as an example and adop-ting soil seed bank analysis combined with vegetation restoration determination , the soil seed banks and vege-tation functional group structure,as well as their relationship,are analyzed and an discussion on the response of functional group,maintenance mechanisms of community stability during the vegetation succession are made. Results show that(1)the perennial grasses and the perennial weeds are dominant species under differ-ent vegetation gradient and their dominant state has not changed significantly. But the situation of annuals and biennials and the Legume plants are not so prominent.(2) In horizontal direction,the perennial weeds have a higher proportion with the smaller change in a small change range in the soil seed bank. The tendency of perennial grasses and Legume plants presents a single curve , while the annuals and biennials show the op-posite tendency. In vertical direction ,compared with the vegetation gradients in 0-5 and 0-15cm layers,dominance ratio of different functional groups presents a significant positive correlation,while the tendency is not obvious for the gradients in 5-10cm and 10-15cm layers.(3) Compared with the standing vegetation,the soil seed banks have more species with higher stability and for the same interference , its group shows a more significant state of survival strategy.