Inadequate　ionic　transport　across　the　electrode/electrolyte　interface　hampers　the　lithium-sulfur　reaction　kinetics,　thereby　limiting　the　electrochemical　performance　of　all-solid-state　lithium-sulfur　batteries　(ASSLSBs).　Herein,　a　kinetically-enhanced　gradient　modulator　layer　(KEGML)　is　proposed　and　fabricated　via　potential　modulation.　In　situ/ex　situ　analyses　reveal　the　optimal　modulated　potential　difference　driving　the　chemical　reaction　between　Li　ions　and　the　P2S5　pre-interphase　product　for　stabilized　KEGML　and　maintained　full-sulfur　conversion.　Cryo-focused　ion　beam-scanning　electron　microscopy　characterization　and　ab-initio　molecular　dynamics　confirm　the　interfacial　reinforcement　by　gradient　uniformization　of　ion　transport　and　enhanced　interface　stability　by　efficiently　avoiding　the　side　effects　between　sulfur/sulfides　solid　electrolyte/carbon,　respectively.　As　a　result,　an　eightfold　increase　in　ionic　transport　capability　is　achieved　with　KEGML　at　the　end　of　the　200　cycles.　Impressively,　KEGML-based　ASSLSBs　not　only　accelerate　the　redox　conversions　but　also　display　an　exceptional　cycling　stability　of　a　specific　capacity　of　1578.9　mAh　g−1　for　≈1.5　years　with　a　99.9%　capacity　retention　and　a　high　areal　capacity　of　13　mAh　cm−2　over　200　cycles,　which　is　among　the　record-level.　Even　in　the　ambient　environment　from　60 °C　to　as　low　as　−30 °C,　it　exhibits　excellent　adaptivity　attributed　to　the　fast　kinetics,　shedding　light　on　future　practical　applications.　©　2025　The　Author(s).　Advanced　Energy　Materials　published　by　Wiley-VCH　GmbH.