Abstract: The Fe-MOF was synthesized by hydrothermal method and then coated with TiO₂ on the surface by sol-gel method. Different proportions of C/Fe₃O₄@TiO₂ three element composite photocatalyst were prepared. The composite was characterized by X ray diffractometer, scanning electron microscope and energy dispersive spectrometer. The results showed that the 1:10 porous carbon/Fe₃O₄@TiO₂ photocatalyst had better adsorption and catalytic efficiency. The degradation rate of methyl blue could reach 95.2%, and it could still reach 91.8% after five times of recycling. Meanwhile it had higher photocatalytic efficiency and recyclability, which had certain value in water pollution treatment.