NOVELTY - A ethanol diesel oil mixed fuel comprises raw materials including mixture A, mixture B, mixture C, mixture D, and auxiliary agent; where the mixture A comprises: ammonium chloride, sodium chloride, calcium chloride, sodium bicarbonate and water; the mixture B comprises: isopropanol, isooctanol, cyclohexanone and methanol; the mixture C comprises: diesel, gasoline, toluene, acetone and ferrocene; the mixture D comprises: water and solvent oil; and the auxiliary agent comprises: hydrogen peroxide, potassium permanganate, water and sodium hydroxide.    USE - As methanol diesel oil mixed fuel (claimed).    ADVANTAGE - The methanol diesel oil mixed fuel is homogeneous transparent with good stability, reduces waste gas pollutant discharge thus environment-friendly and prepared using simple and economical preparation method.    DETAILED DESCRIPTION - An environment-friendly methanol diesel oil mixed fuel comprises raw materials including 1.565-3.28 parts by weight (pts.wt.) of mixture A, 43.8-82 pts.wt. of mixture B, 14.12-48.72 pts.wt. of mixture C, 3.5-8 of mixture D, and 2.015-3.36 of auxiliary agent; where the mixture A comprises: 0.02-0.07 pts.wt. of ammonium chloride, 0.02-0.07 pts.wt. of sodium chloride, 0.015-0.07 pts.wt. of calcium chloride, 0.01-0.07 pts.wt. of sodium bicarbonate, and 1.5-3 pts.wt. of water; the mixture B comprises: 1.5-3 pts.wt. of isopropanol, 1-2 pts.wt. of isooctanol, 1.3-2 pts.wt. of cyclohexanone and 40-75 pts.wt. of methanol; the mixture C comprises: 10-40 pts.wt. of diesel, 1-1.5 pts.wt. of gasoline, 1-2 pts.wt. of toluene, 2-5 pts.wt. of acetone, and 0.12-0.22 pts.wt. of ferrocene; the mixture D comprises: 3-7 pts.wt. of water, and 0.5-1 pts.wt. of solvent oil; and the auxiliary agent comprises: 0.5-0.8 hydrogen peroxide, 0.01-0.05 potassium permanganate, 1.5-2.5 pts.wt. of water, and 0.005-0.01 of sodium hydroxide. An INDEPENDENT CLAIM is included for preparing methanol diesel oil mixed fuel involving: mixing at normal pressure and at normal temperature, ammonium chloride, sodium chloride, calcium chloride, and sodium bicarbonate according to parts by weight, then adding water to generate hydrolyzing to obtain milky white liquid mixture A; mixing at normal pressure and at normal temperature, isopropyl alcohol, isopropyl ketone and isooctanol, and adding methanol to obtain mixture B; at normal pressure and at normal temperature, adding water, followed by adding toluene, gasoline, acetone, dicyclopentadienyl iron in tank, and standing for 30-55 degrees C to obtain mixture C; mixing at normal pressure and at normal temperature, adding solvent in mixing tank, then adding water for hydrolyzing at 15-35 degrees C to obtain mixture D; and a methanol diesel oil, firstly preparing a clean mixing tank by adding the mixture A, and the mixture B to obtain modified methanol; mixing diesel oil, isopropanol, isooctanol, cyclohexanone and modified methanol to form light yellow transparent liquid, and then adding the mixture D into the mixing tank, to produce a slight emulsification reaction, and then adding hydrogen peroxide, potassium permanganate and sodium hydroxide in the mixing tank, and mixing to obtain the methanol diesel fuel.