ZnIn2S4/WO3　nanocomposites,　with　ZnIn2S4　nanosheets　loaded　on　WO3　nanorods,　were　synthesized　by　self　assembly　of　hexagonal　ZnIn2S4　in　the　presence　of　preformed　WO3　center　dot　H2O　nanoplates.　PtS　and　MnO2,　the　co-catalysts　for　H-2　and　O-2　evolution,　respectively,　were　selectively　loaded　on　ZnIn2S4　and　WO3　in　the　nanocomposites.　The　resultant　PtS-ZnIn2S4/WO3-MnO2　nanocomposites　show　photocatalytic　activity　for　overall　water　splitting　to　produce　H-2　and　O-2　under　visible　light.　An　optimum　activity　was　achieved　over　0.5%PtS-20%ZnIn2S4/WO3-3.0%　MnO2,　in　which　5.94　mu　mol　of　H-2　and　2.24　mu　mol　O-2　were　evolved　in　8　h.　The　apparent　quantum　yield　(AQY)　for　H-2　evolution　was　determined　to　be　ca.　0.50%　at　420　nm.　The　superior　photocatalytic　activity　for　overall　water　splitting　over　PtS-ZnIn2S4/WO3-MnO2　nanocomposites　can　be　ascribed　to　an　efficient　coupling　of　photocatalytic　water　reduction　over　PtS-ZnIn2S4　and　photocatalytic　water　oxidation　over　MnO2-WO3　via　a　Z-scheme　charge　transfer　pathway.　This　study　demonstrates　a　high　potential　of　fabrication　of　the　all-solid　Z-scheme　photocatalytic　systems　for　overall　water　splitting.