In view of the characteristics of P2P storage, a novel Erasure Code based segmented file P2P storage strategy is designed, and the Chord protocol based P2P storage structure is constructed. The effective file storage, access and update function of the novel strategy overcome the deficiencies of the traditional Erasure Code P2P storage strategy, enabling the stored file to have a certain data revision capability and structure expansion-contraction capability. Theoretical analysis and experimental simulation verify that the novel strategy has reasonable feasibility and effectiveness.