Cadmium　sulfide　(CdS)　is　a　photocatalyst　widely　used　for　efficient　H-2　production　under　visible　light　irradiation,　due　to　its　narrow　bandgap　and　suitable　conduction　band　position.　However,　the　fast　recombination　of　carriers　results　in　their　low　utilization.　In　order　to　improve　photocatalytic　hydrogen　production,　it　reports　the　successful　introduction　of　metallic　Cd　and　S　vacancies　on　CdS　nanorods　(CdS　NRs)　by　a　facile　in　situ　chemical　reduction　method,　using　a　thermal　treatment　process.　This　procedure　generates　interfacial　and　polarization　electric　fields,　that　significantly　improve　the　photocatalytic　hydrogen　production　performance　of　CdS　NRs　in　sodium　sulfide　and　sodium　sulfite　aqueous　solutions,　under　visible　light　irradiation　(&　lambda;　＞420　nm).　The　introduction　of　these　electric　fields　is　believed　to　improve　charge　separation　and　facilitate　faster　interfacial　charge　migration,　resulting　in　a　significantly　optimized　catalyst,　with　a　photocatalytic　hydrogen　evolution　rate　of　up　to　10.6　mmol(-1)　g(-1)　h(-1)　with　apparent　quantum　efficiency　(AQE)　of　12.1%　(420　nm),　which　is　8.5　times　higher　than　that　of　CdS.　This　work　provides　a　useful　method　to　introduce　metallic　and　S　vacancies　on　metal　sulfide　photocatalysts　to　build　local　polarization　and　interfacial　electric　fields　for　high-performance　photocatalytic　H-2　production.