Hierarchical　Ag/SiO2/TiO2　nanobowl　(NB)　arrays　were　fabricated　for　use　as　plasmonic　photoanodes　for　solar-hydrogen　conversion.　The　nanobowls　had　large　pore　size　and　were　composed　of　an　upper　TiO2　nanoring　and　a　lower　TiO2　nanohole.　A　thin　SiO2　inter-layer　was　introduced　as　an　electron　transmission　channel　to　change　the　mechanism　of　hot　electron　transport.　Simulations　were　performed　to　characterize　the　variation　of　electron　concentration　in　Ag/SiO2/TiO2　NB　arrays,　taking　into　account　both　the　optical　transition　of　photogenerated　electrons,　and　electron　tunneling.　The　multiphysics　coupling　function　of　COMSOL　software　provided　the　light　source　for　optical　transition　of　photogenerated　electrons,　and　a　Wentzel-Kramers-Brillouin　model　was　employed　to　represent　the　tunneling.　The　results　demonstrate　that　the　TiO2　nanoring　was　a　transporter,　which　transmitted　electrons　downward　to　the　nanohole.　The　SiO2　layer　replaces　the　Schottky　barrier　to　become　a　bridge　for　tunneling　of　hot　electrons　in　high-　and　low-energy　states　into　TiO2.　Moreover,　the　coverage　of　the　SiO2　layer　helped　increase　the　light　absorption　of　TiO2,　it　also　reduced　the　near　electric　field　coupling　between　Ag　and　TiO2.　Accordingly,　under　AM　1.5　light　irradiation,　the　photocurrent　density　and　average　hydrogen　evolution　rate　of　Ag/SiO2/TiO2　were　1.8　and　2.2　times　higher,　respectively,　than　those　of　pure　TiO2,　implying　far　more　efficient　migration　of　carriers.