The invention relates to a preparation method of fuel oil for fuel stoves. The fuel oil is prepared from, by weight, 0.4-0.6% of sodium hydroxide, 0.1-0.3% of sodium nitrate, 4-15% of water, 70-82% of methanol, 2-5% of hydrogen peroxide, 3-5% of anhydrous ethanol, 0.1-0.3% of ferrocene, and 0.5-0.7% of edible essence, and the sum of the weight proportions of all above components is 100%. The preparation technology comprises the following steps: mixing sodium hydroxide and sodium nitrate with water, stirring sodium hydroxide, sodium nitrate and water to prepare a mixed solution A, adding methanol, hydrogen peroxide and anhydrous ethanol to the mixed solution A, stirring to prepare a mixed solution B, taking out 10-12% of the mixed solution B, adding ferrocene and the edible essence to prepare a mixed solution C, allowing the mixed solution C to stand and precipitate, taking the obtained clear liquid, pouring the clear liquid to the mixed solution B, and stirring the clear liquid and the mixed solution B to prepare the final product. The technology has the advantages of effective solving of the problems of low efficiency and insufficient combustion of present fuel oils, good safety and reliability, convenience in use, energy saving and high efficiency, and healthiness and environmental protection.