Transition　metal　selenides　are　regarded　as　most　promising　anode　materials　for　sodium　ion　battery　(SIB)　due　to　their　high　theoretical　specific　capacity　and　environment　benignly.　Yet　the　severe　volume　expansion　and　sluggish　kinetics　during　cycling　leading　to　capacity　fading　and　material　pulverizing　restrict　its　application　in　SIB.　Herein,　iron　selenides　(N-FeSe2)　with　controlled　porous　structure　is　synthesized　via　facile　salt　template-assisted　method.　When　N-FeSe2　with　hierarchical　pore　structure　serves　as　anode　materials　for　SIB,　a　highly　reversible　capacity　of　520.4　mA　h　g-1　is　maintained　at　1　A　g-1　after　100　cycles.　Even　at　10　A　g-1,　the　capacity　still　remains　333　mA　h　g-　1　after　1800　cycles,　which　shows　extraordinary　cycle　stability.　In　addition,　N-FeSe2　provides　excellent　diffusion　coefficient　and　high　initial　Coulomb　efficiency　(78.9　%),　which　is　attributed　to　its　special　hierarchical　porous　structure　and　intrinsic　pseudocapacitance　characteristics.　DFT　calculations　indicate　that　an　increase　in　vacancy　concentration　enhances　the　conductivity　of　the　material,　thereby　improving　its　dynamic　performance.　In　this　work,　a　simple　and　universal　synthesis　method　is　developed,　and　the　pore　structure　and　morphology　of　the　final　product　can　be　controlled　by　simple　parameter　regulation.