Sodium　ion　batteries　are　considered　as　one　of　the　most　promising　energy　storage　devices　as　lithium　ion　batteries　due　to　the　natural　abundance　of　sodium.　TiO2　is　very　popular　as　anode　materials　for　both　lithium　and　sodium　ion　batteries　because　of　the　nontoxicity,　safety　and　great　stabilities.　However,　the　low　electronic　conductivities　and　inferior　sodium　ion　diffusion　make　it　becoming　a　great　challenge　to　develop　advanced　TiO2　anodes.　Doping　heteroatoms　and　incorporation　of　defects　are　believed　to　be　great　ways　to　improve　the　electrochemical　performance　of　TiO2　anodes.　In　this　work,　commercial　TiO2　(P25)　nanoparticles　was　modified　by　hydrogen　and　nitrogen　high-power　plasma　resulting　in　a　disordered　surface　layer　formation　and　nitrogen　doping　as　well.　The　electrochemical　performances　of　the　samples　as　anode　materials　for　sodium　ion　batteries　was　measured　and　the　results　indicated　that　after　the　hydrogen-nitrogen　plasma　treatment,　H-N-TiO2　electrode　shows　a　43.5%　of　capacity　higher　than　the　P-TiO2　after　400　cycles　long-term　discharge/charge　process,　and　the　samples　show　a　good　long　cycling　stability　as　well,　the　Coulombic　efficiencies　of　all　samples　are　nearly　99%　after　50　cycles　which　could　be　sustained　to　the　end　of　long　cycling.　In　addition,　hydrogen-nitrogen　plasma　treated　TiO2　electrode　reached　the　stable　high　Coulombic　efficiency　earlier　than　the　pristine　material.　High　resolution　TEM　images　and　XPS　results　indicate　that　there　is　a　disordered　surface　layer　formed　after　the　plasma　treatment,　by　which　defects　(oxygen　vacancies)　and　N-doping　are　also　introduced　into　the　crystalline　structure.　All　these　contribute　to　the　enhancement　of　the　electrochemical　performance.