Alcohol group biodiesel comprises 2-5 parts of denatured alcohol, 2-5 parts of polyatomic alcohol, 8-15 parts of bio-oil, 50-65 parts of primary oil, 15-20 parts of kerosene, 1-4 parts of cetane number improver, 0.1-0.3 part of stabilizer and 0.7-0.9 part of powerful agent; the denatured alcohol is a mixed reactant of methyl alcohol, acetone, dimethyl ether, sodium chloride, ferrocene, polyisobutene and polyethylene-vinyl acetate; the stabilizer is a mixture of oleic acid, cyclic-propionic acid and diethylamine or propylamine; the powerful agent is a mixture of isoamyl nitrite and tetranitromethane. The alcohol group biodiesel is used as diesel vehicle fuel, an engine does not need to be modified, the power and the fuel consumption are equal to those of common diesel, and the alcohol group biodiesel and the common diesel are soluble at any ratio; harmful gas emission in automobile tail gas can be effectively reduced; composition is simple and raw materials are wide; the storage time is long, and the problems of layering and going bad are avoided; the alcohol group biodiesel is worth being produced in mass, popularized and used.