Nowadays,　the　main　deficiency　in　boosting　the　commercialization　of　sodium　ion　battery　is　the　relatively　low　energy　density.　Herein,　we　propose　a　new　way　to　significantly　improve　the　energy　density　by　constructing　low　negative/positive　(N/P)　ratio　sodium-based　batteries　enabled　by　reversible　Na　metal　electrodeposition　on　sodiophilic　zinc-metal-decorated　hard　carbons　(HC-Zn)　anode.　HC-Zn　is　used　as　a　typical　insertion　anode,　and　simultaneously　as　a　substrate　for　Na　metal　plating,　leading　to　the　formation　of　a　composite　NaxC-Na　metal　anode　with　a　hybrid　energy　storage　process.　We　also　provide　a　general　and　low-cost　method　of　Zn　metal　coating　on　various　hard　carbons.　The　compatibility　between　Zn　and　Na　metal　is　firstly　revealed　by　molecular　dynamics　simulations.　As　a　result,　HC-Zn　electrode　exhibits　a　highly　reversibility　even　at　a　high-capacity　of　1100　mA　h　g(-1)　and　5C　rate,　which　can　stably　cycle　1400　cycles　with　a　high　Coulombic　efficiency　around　100%.　Finally,　the　full　cells　of　HC-Zn　anode　coupling　with　sodium　vanadyl　phosphate　cathode　with　low　NP　ratio　(NP　=　0.8　and　0.6)　are　constructed　which　display　good　cycling　stability　and　remarkably　improved　energy　density　from　220　Wh/kg　of　regular　NP　1.1　to　286　Wh/kg.