Developing　stable　conductive　materials　with　high　conductivity　for　sodium　ion　(Na+)　batteries　attracts　ever-increasing　attention.　In　this　work,　MOF-based　solid　Na+-conducting　composites　functionalized　by　ionic　liquids　(ILs)　were　explored　through　introducing　five　kinds　of　ILs　and　their　corresponding　sodium　salts　into　the　pores　of　MIL-101-SO3Na.　The　pore-filling　fraction　of　MIL-101-SO3Na　was　established　and　revealed　as　a　key　factor　to　enhance　the　ionic　conductivity　of　the　composites.　Na-salts　could　further　improved　the　conductivity　by　increasing　the　number　of　conductive　ions.　Furthermore,　all　ILs　and　Na-salts@MIL-101-SO3Na　hybrid　composites　showed　sharply　enhanced　ionic　conductivity　and　displayed　low　activation　energy.　Particularly,　as　the　pore-filling　faction　elevating　to　96.94　%　with　[Emim][BF4]　and　NaBF4　in　the　pores　of　MIL-101-SO3Na　the　ionic　conductivity　reached　up　to　1.32x10(-2)　S　cm(-1)　and　stabilized　within　30　days　at　150　degrees　C.　This　study　on　Na+-conduction　in　a　MOF-based　system　functionalized　by　ILs,　providing　guidance　for　exploring　new　solid　ionic　conducting　materials.