Manganese　oxides　have　high　theoretical　capacity　and　abundant　reserves,　which　are　considered　commercially　promising　electrode　materials　for　supercapacitors.　However,　its　poor　conductivity　and　low　specific　surface　area　severely　limit　the　improvement　of　energy　storage　capacity.　In　this　research,　we　fabricate　porous　single-crystalline　(PSC)　MnOx　(MnO,　MnO2,　Mn2O3,　and　Mn3O4)　from　MnCO3　single　crystal　by　a　lattice　reconstruction　strategy.　The　large　specific　surface　area　of　the　porous　structure　and　the　long-range　ordered　lattice　characteristics　of　single　crystals,　combined　with　the　active　sites　of　unsaturated　oxygen　coordination,　significantly　improve　energy　storage　performance　and　durability.　The　PSC　MnOx　with　rich　oxygen　vacancies　(OVs)　exhibit　excellent　pseudocapacitance　since　the　local　electric　field　induced　by　the　unbalanced　distribution　of　charges　around　the　OVs　increases　the　migration　rate　of　Na+　in　the　electrolyte.　Electrochemical　studies　show　that　the　pseudocapacitance　of　the　PSC　MnOx　materials　is　enhanced　and　exhibits　excellent　cyclic　stability.　This　work　opens　a　new　way　to　improve　the　pseudocapacitance　performance　of　manganese　oxides　and　provides　a　reference　for　the　research　of　transition　metal　oxides　energy　storage.