In　this　paper,　we　used　first　principle　calculation　and　experimental　investigation　for　exploring　the　application　of　Na3V2(PO4)(2)F-3.　The　influence　of　insertion　and　extraction　of　Na　was　investigated　using　XRD　analysis.　Results　indicated　the　Na3V2(PO4)(2)F-3　owing　a　stable　lattice　structure　with　unit　cell　volume.　The　desodiated　phase　of　the　Na3V2(PO4)(2)F-3　could　remain　a　stable　state　until　700　degrees　C,　which　provide　an　excellent　stability　for　battery　electrode　fabrication.　The　experimental　study　showed　the　Na3V2(PO4)(2)F-3　could　serve　as　an　excellent　candidate　for　rechargeable　Na　battery　fabrication.