All-solid-state　lithium　batteries　(ASSLBs)　hold　great　promise　to　develop　high-energy-density　and　safety　secondary　batteries,　but　suffer　from　the　fundamental　obstacles　of　interfacial　mechano-electrochemical　instabilities　and　lithium　(Li)　dendrite　growth.　Herein,　a　kinetics-reinforced　mechano-electrochemical　stable　lithium-silicon-nitrogen　composites　(LSN),　is　developed,　which　can　effectively　promote　the　interfacial　stabilities　and　suppress　Li　dendrite　propagation.　With　the　integration　of　silicon,　interfacial　electrochemical　stability　is　significantly　improved　by　cutting　down　the　potential　difference　between　the　Li6PS5Cl　solid　electrolyte　and　LSN.　The　participation　of　nitrogen　accelerates　the　kinetic　process　of　Li　diffusion,　which　mitigates　concentration　polarization　and　reduces　the　interfacial　overpotential.　Simultaneously,　interfacial　contact　loss　has　been　successfully　restricted　due　to　the　upholding　of　the　Li4.4Si　&　Li3N　framework.　The　mechanical,　electrochemical,　and　kinetical　reinforced　Li6PS5Cl/LSN　interface　enables　a　high　critical　current　density　of　15.2　mA　cm-2　(50　degrees　C),　and　a　stable　cycling　of　ASSLBs　(70.11%　capacity　retention　after　500　cycles),　thus　overcoming　the　instinct　drawbacks　of　lithium　metal　anode　and　establishing　a　scalable　design　principle　for　dendrite-free　ASSLBs.