The invention provides a novel organic solvent system for hydrogen peroxide production. The system is composed of C9-C10 heavy aromatics, trioctyl phosphate and phthalate. The prepared ternary organic solvent system has the significant advantages that the solubility of alkyl-anthraquinone and alkyl-oxanthranol is high, and a hydrogenated solution has high hydrogenation efficiency; hydrogen peroxide has a high distribution coefficient, the production efficiency of an extraction tower can be improved, and the content of hydrogen peroxide in extraction raffinate is decreased.