NOVELTY - Semiconductor heterojunction/conductive polymer fibrous membrane complex photocatalyst is claimed. The complex photocatalyst is obtained by load distributing of the semiconductor heterojunction on the surface of conductive polymer fibrous membrane via chemical bond complexation. The semiconductor heterojunction is zinc sulfide-cadmium sulfide/titanium dioxide, tin(II) sulfide/titanium dioxide, lead sulfide/titanium dioxide, bismuth sulfide/titanium dioxide, tin(IV) sulfide/titanium dioxide, cadmium sulfide/titanium dioxide or tin(II) sulfide-cadmium sulfide/titanium dioxide.    USE - Used as a semiconductor heterojunction/conductive polymer fibrous membrane complex photocatalyst.    ADVANTAGE - The photocatalyst comprises conductive polymer fibrous membrane, which ensures electron hole separation during the process of sewage treatment and hydrogen production, and improves the catalytic efficiency of catalyst.    DETAILED DESCRIPTION - Semiconductor heterojunction/conductive polymer fibrous membrane complex photocatalyst is claimed. The complex photocatalyst is obtained by load distributing of the semiconductor heterojunction on the surface of conductive polymer fibrous membrane via chemical bond complexation. The semiconductor heterojunction is zinc sulfide-cadmium sulfide/titanium dioxide, tin(II) sulfide/titanium dioxide, lead sulfide/titanium dioxide, bismuth sulfide/titanium dioxide, tin(IV) sulfide/titanium dioxide, cadmium sulfide/titanium dioxide or tin(II) sulfide-cadmium sulfide/titanium dioxide. The size of the semiconductor heterojunction is 20-5000 nm. The conductive polymer fibrous membrane with fiber diameter of 400 nm to 2 mu m is obtained by mixing and spinning the polymer and the conductive material under high electrostatic pressure. The polymer is polyvinylidene fluoride, bisphenol-A-polysulfone, polyphenylene sulfone, polyether sulfone, phenylethylene-maleic anhydride copolymer, hexafluorobutyl acrylate-methacrylic acid copolymer, dodecafluoroheptyl methacrylate ester-methacrylic acid copolymer, polyaniline, polystyrene, polyethylene oxide, polyacrylonitrile, polyepoxyethane and/or poly(p-phenylene vinylene). The conductive material is nano graphite, carbon black, carbon nano tube or polyaniline, and the added amount is 1-10% of the polymer. An INDEPENDENT CLAIM is also included for preparing the semiconductor heterojunction/conductive polymer fibrous membrane complex photocatalyst, comprising: (i) adding the polymer and the conductive material to the solvent, stirring uniformly to obtain the mixed solution with viscosity of 600-1400 centipoise, and passing the mixed solution via the high pressure electrostatic spinning to obtain the conductive polymer fibrous membrane; (ii) immersing the conductive polymer fibrous membrane into the mixed solution for 0.5-10 days, where the mixed solution is aqueous solutions of bismuth nitrate, zinc compound, lead compound, tin compound and/or cadmium compound with the concentration of 0.1-1 mol/l, drying for 2-8 hours at 40-80 degrees C, adding aqueous solution of thiourea or thioacetamide of molar concentration 0.5-2 times of sum of the solute dissolved in the mixed solution, reacting for 0.5-10 days in a closed container at 50-200 degrees C, washing and drying to obtain the sulfide loading conductive polymer fibrous membrane; and (iii) immersing the sulfide loading conductive polymer fibrous membrane in aqueous solution of titanyl sulfate (0.1-1 mol/l) for 0.5-10 days, adding aqueous solution of urea of molar concentration 0.1-10 times of that of titanyl sulfate, reacting in the closed container for 0.5-10 days at 50-200 degrees C, washing and drying to obtain the product. The zinc compound is zinc nitrate, zinc acetate or zinc sulfate. The lead compound is lead nitrate, lead acetate or lead sulfate. The tin compound is tin tetrachloride or stannous chloride. The cadmium compound is cadmium chloride or cadmium sulfate.