Lithium　dendrites　are　a　major　issue　that　restrict　the　commercialization　of　lithium　metal　batteries.　It　is　well-accepted　that　lithium　dendrite　nucleation　can　be　suppressed　by　improving　the　Li+　transference　number　based　on　the　classical　Sand＇s　time　principle.　Here,　a　self-standing　anionic　metal-organic　framework　(MOF)-based　functional　separator　with　small　pores　is　developed　by　simple　doctor-blading　to　accelerate　Li+　transport　for　an　improved　lithium　metal　anode.　The　design　of　this　separator　is　based　on　the　nano-confined　channels　of　the　MOF　and　negatively　charged　moieties　(-SO3-)　on　the　surface.　Benefiting　from　the　strong　electrostatic　interaction　between　the　negatively　charged　nanochannels　and　ions　within　the　liquid　electrolyte,　the　anion　transport　is　effectively　suppressed,　while　the　lithium-ion　transmission　is　accelerated.　Consequently,　a　high　Li+　transference　number　of　up　to　0.85　is　achieved　within　the　liquid　electrolyte,　which　enables　ultra-stable　Li　plating/stripping　on　the　lithium　metal　anode　for　over　4000　h　at　a　high　current　density　of　5　mA　cm(-2).　This　work　is　expected　to　provide　new　insight　into　the　development　of　dendrite-free　and　high-rate　lithium　metal　batteries.