The　development　of　full-spectrum　composite　photocatalysts　is　a　promising　approach　to　enhance　solar　energy　utilization.　In　this　study,　the　FeTiO3/NaYF4:　Yb,　Dy,　Nd　(FNYDN)　upconversion　composite　photocatalysts　were　successfully　synthesized　via　the　hydrothermal　method.　The　upconversion　effect　of　rare　earth　ions　on　nearinfrared　light　is　utilized　to　broaden　the　absorption　range　of　visible　light,　thereby　further　improving　the　efficiency　of　solar　energy　utilization.　Compared　to　pure　FeTiO3　(80.83　%)　and　NaYF4　(37.76　%),　the　0.75　FNYDN　(93.51　%)　samples　showed　significantly　higher　photo-Fenton　activity　for　degradating　antibiotics　under　visiblenear　infrared　(Vis-NIR)　light.　The　upconversion　luminescence　at　980　nm　and　visible　near-infrared　(UV-VisNIR)　spectrophotometer　indicate　that　the　incorporation　of　NaYF4:　Yb,　Dy,　Nd　(NYDN)　can　broaden　the　utilization　of　near　infrared　light,　enhancing　the　degradation　activity　of　organic　pollutants　under　the　NIR-light　irradiation.　Particularly,　in　the　NIR　light　condition,　the　degradation　efficiency　of　TCH　by　0.75　FNYDN　can　go　up　to　86.72　%　due　to　upconversion　function　of　rare　earth　ions.　Besides,　several　characterizations　suggest　that　the　formation　of　Z-Scheme　heterojunction　between　FeTiO3　and　NYDN　enables　effective　separation　and　transfer　of　photocarriers.　Thus,　the　enhanced　photo-Fenton　activity　of　the　0.75　FNYDN　heterojunction　can　be　attributed　to　the　synergistic　effects　of　upconversion　and　the　Z-Scheme　heterojunction.　This　experimental　investigation　provides　a　sound　basis　for　the　preparation　of　efficient　upconversion　composite　photocatalysts.