TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preparation (claimed): The fused ring thiophene organic photovoltaic material is prepared by performing condensation reaction to raw materials of formulae (II) and (III) and malononitrile by action of catalysts to obtain two condensed intermediate products, and performing Stille coupling reaction to the condensed intermediate products and trimethylstannyl-containing compound of formula (IV) under the catalysis of the organic palladium to obtain the fused ring thiophene organic photovoltaic material. The condensation reaction comprises adding the raw materials (II) or (III) into the solvent, reacting with malononitrile at 20-150 degrees C for 1-5 days, dripping the catalyst while reacting, refining, and performing chromatographic separation to obtain condensed intermediate products. The Stille coupling reaction comprises dissolving condensed intermediate products and compound (IV) into the solvent under the insert gas, adding the catalyst, e.g. organic palladium, reacting at 60-150 degrees C for 1-6 days, reducing to room temperature, refining, and performing column chromatography to obtain fused ring thiophene organic photovoltaic material. The photovoltaic material can be prepared by performing Stille coupling reaction to the raw materials and organic palladium to obtain the coupled intermediate products; performing the condensation reaction to the coupled intermediate products and malononitrile.R1-R4=H or 1-20C alkyl, preferably 1-8C alkyl.Preferred Component: The solvent for condensation reaction is ethanol, methanol, dichloromethane, tetrahydrofuran, ethyl acetate, dimethylformamide, methylbenzene, or benzophenone. The catalyst for condensation reaction is pyridine or triethylamine. The solvent for the Stille coupling reaction is tetrahydrofuran, ethyl acetate, glycol dimethyl ether, benzene, or methylbenzene. The organic palladium is tris(dibenzylideneacetone)dipalladium/P(o-Tol)3, tetrakis (triphenylphosphine) Palladium, or bis(triphenylphosphine)palladium chloride.