Driven　by　the　urgent　need　for　eco-friendly,　safe　and　facile　production　processes　for　hydrogen　peroxide　(H2O2),　piezocatalysis　shows　significant　potential　due　to　its　accessible　energy　supply　and　capacity　for　on-site　H2O2　preparation.　Owing　to　their　tunable　surface　properties　and　unique　electronic　structures,　transition　metal　dichalcogenides　(TMDCs)　are　regarded　as　promising　piezocatalysts.　Nevertheless,　the　uneven　distribution　of　active　sites,　poor　stability,　and　restricted　electron　transport　capabilities　hinder　the　further　improvement　of　their　piezocatalytic　performance.　In　this　study,　WS2　thin　sheets　were　prepared　by　liquid-phase　stripping,　which　significantly　increase　the　number　of　exposed　active　sites　to　provide　an　optimized　interfacial　environment　for　the　adsorption　of　reactant　molecules,　and　the　resulting　thin-layer　structure　greatly　improves　the　charge　transfer　efficiency.　More　importantly,　WS2　thin　sheets　were　utilized　in　piezocatalytic　H2O2　evolution.　Remarkably,　under　conditions　of　pure　water　and　ambient　air,　these　thin　sheets　exhibit　outstanding　piezocatalytic　performance　with　an　H2O2　evolution　rate　as　high　as　994.7　mu　mol　g-1　h-1.　And　they　retained　80.14　%　of　their　activity　after　10　h　of　cyclic　operation,　demonstrating　excellent　cycling　stability.　Furthermore,　mechanistic　investigations　propose　three　potential　pathways　for　H2O2　evolution,　providing　a　novel　perspective　for　elucidating　the　underlying　mechanism　of　piezocatalysis　in　TMDCs.