CdS　has　been　regarded　as　a　promising　photocatalytic　water-splitting　visible-light　photocatalyst,　but　low　catalytic　activity　and　photocorrosion　seriously　limited　its　practical　application.　Here,　inspired　by　core-shell　principles,　we　try　to　fabricate　CdS@MoS2　core-shell　structures　by　utilizing　unstable　CdS　nanowires　as　core　and　multilayered　MoS2　as　shell.　Multilayered　MoS2　not　only　serves　as　a　protective　shell　to　preserve　CdS　but　also　provides　abundant　reactive　sites　and　forms　a　type　I　junction,　giving　rise　to　remarkable　hydrogen　production　activities.　The　optimum　hydrogen　production　rate　based　on　CdS@MoS2　core-shell　composite　reaches　26.14　mmol·h-1·g-1,　which　is　about　54　times　greater　than　that　of　pure　CdS　and　about　twice　that　of　CdS　nanowires　with　1%　Pt.　Impressively,　the　presentation　of　MoS2　nanosheets　can　effectively　avoid　photocorrosion,　which　resulted　in　12　h　stable　hydrogen　production.　©　2017　American　Chemical　Society.