A novel visible light active photo-catalyst named CHC/C-PVA/TiO_2, the composite of titanium dioxide(TiO_2)with conjugated derivative of polyvinyl alcohol(C-PVA) loaded on a cordierite honeycomb ceramic(CHC)substrate, was fabricated by combining the synthesis of TiO_2 sol, preparation of C-PVA via thermally treating polyvinyl alcohol, and immobilization of TiO_2 sol and C-PVA on CHC. By detecting the change of UV–vis absorption spectra of the model organic pollutant(methyl orange(MO)) in the presence of the composite under visible light irradiation, the photo-catalytic activity was evaluated and the results show that the CHC/C-PVA/TiO_2 composite has an enhanced photo-catalytic activity when compared to the CHC/TiO_2 composite. Besides, the CHC/C-PVA/TiO_2 shows a good photo-catalytic stability after the fourth cycles. The structure analyses by scanning electron microscope(SEM) and energy dispersive X-ray spectroscopy(EDS) show the coexistence of C-PVA and TiO_2 on the CHC and the cracks on the surface of CHC/C-PVA/TiO_2. Result of ultraviolet-visible diffuse reflection spectroscopy(UV–vis DRS) reveals that the CHC/C-PVA/TiO_2 can absorb both ultraviolet and visible light while result of X-ray photoelectron spectroscopy(XPS) indicates the existence of C, O and Ti elements in the CHC/C-PVA/TiO_2. The typical structures as well as the optical characteristics of the CHC/C-PVA/TiO_2 are responsible for the enhancement in the photo-catalytic activity. A novel visible light active photo-catalyst named CHC / C-PVA / TiO_2, the composite of titanium dioxide (TiO_2) with conjugated derivative of polyvinyl alcohol (C-PVA) loaded on a cordierite honeycomb ceramic combining the synthesis of TiO 2 sol, preparation of C-PVA via isothermal treating polyvinyl alcohol, and immobilization of TiO 2 sol and C-PVA on CHC. By detecting the change of UV-vis absorption spectra of the model organic pollutant (methyl orange (MO )) in the presence of the composite under visible light irradiation, the photo-catalytic activity was evaluated and the results show that the CHC / C-PVA / TiO 2 composite has an enhanced photo-catalytic activity when compared to the CHC / TiO 2 composite. The structure analyzes by scanning electron microscope (SEM) and energy dispersive X-ray spectroscopy (EDS) show the coexistence of C-PVA and TiO_2 on the CHC and the cr Results of ultraviolet-visible diffuse reflection spectroscopy (UV-vis DRS) reveals that the CHC / C-PVA / TiO_2 can absorb both ultraviolet and visible light while result of X-ray The typical structures as well as the optical characteristics of the CHC / C-PVA / TiO 2 are responsible for the enhancement in the CHC / C-PVA / TiO 2. photo-catalytic activity.