Severe　interfacial　side　reactions　of　polymer　electrolyte　with　LiNi0.8Co0.1Mn0.1O2　(NCM811)　cathode　and　Li　metal　anode　restrict　the　cycling　performance　of　solid-state　NCM811/Li　batteries.　Herein,　we　propose　a　chemically　stable　ceramic-polymer-anchored　solvent　composite　electrolyte　with　high　ionic　conductivity　of　6.0x10(-4)　S　cm(-1),　which　enables　the　solid-state　NCM811/Li　batteries　to　cycle　1500　times.　The　Li1.4Al0.4Ti1.6(PO4)(3)　nanowires　(LNs)　can　tightly　anchor　the　essential　N,　N-dimethylformamide　(DMF)　in　poly(vinylidene　fluoride)　(PVDF),　greatly　enhancing　its　electrochemical　stability　and　suppressing　the　side　reactions.　We　identify　the　ceramic-polymer-liquid　multiple　ion　transport　mechanism　of　the　LNs-PVDF-DMF　composite　electrolyte　by　tracking　the　Li-6　and　Li-7　substitution　behavior　via　solid-state　NMR.　The　stable　interface　chemistry　and　efficient　ion　transport　of　LNs-PVDF-DMF　contribute　to　superior　performances　of　the　solid-state　batteries　at　wide　temperature　range　of　-20-60　degrees　C.