Through　the　hydrothermal　synthesis　of　indium-doped　titanium　dioxide　(In-TiO2),　we　observed　that　the　indium　element　intricately　integrated　into　the　rutile　TiO2　lattice,　leading　to　surface　protrusions　on　the　nanorods,　forming　aggregated　nanorod　structures.　This　unique　nanostructure　not　only　significantly　increases　the　specific　surface　area　of　the　nanomaterial　but　also　effectively　enhances　the　efficiency　of　charge　transfer　and　light　absorption.　Through　validation　by　various　structural　characterization　methods,　including　high-resolution　transmission　electron　microscopy　(HRTEM)　and　X-ray　photoelectron　spectroscopy　(XPS),　we　confirmed　the　presence　of　this　structure.　This　series　of　validations　provides　a　solid　theoretical　foundation　and　experimental　evidence　for　our　research.　The　performance　test　results　show　that　at　1.23　V,　the　In-TiO2　exhibits　an　impressive　photocurrent　density　of　4.78　mA　cm(2)　compared　to　the　standard　reference　electrode,　3.5　times　higher　than　that　of　pure　TiO2　under　AM　1.5　G　illumination　conditions.　Furthermore,　the　hydrogen　production　rate　of　In-TiO2　is　approximately　0.103　mmol　h　cm(-2),　significantly　higher　than　that　of　pure　rutile　TiO2,　which　is　0.046　mmol　h　cm(-2).　This　study　profoundly　reveals　the　importance　of　indium　doping　in　the　TiO2　lattice　for　enhancing　the　efficiency　of　photo-catalytic　hydrogen　production,　providing　valuable　insights　for　the　future　development　of　photocatalytic　technology.　As　research　on　novel　photocatalysts　advances,　we　look　forward　to　further　breakthroughs　and　progress,　aiming　to　make　greater　contributions　to　addressing　energy　and　environmental　challenges.