The invention relates to
biomass fuel oil. The
biomass fuel oil comprises the following components in percentage by weight: 10 to 15 percent of
vegetable oil, 10 to 40 percent of bio-
alcohol, 5 to 15 percent of bio-diesel, 0 to 5 percent of
fatty acid, 5 to 15 percent of mutual
solvent, 0 to 10 percent of
combustion accelerant, 0.1 to 1 percent of
solid base catalyst, 0.1 to 1 percent of
combustion improver, 0.1 to 0.5 percent of
oxygenate and 0.1 to 0.5 percent of detergent. A preparation method of the
biomass fuel oil comprises the following steps of: a, adding and uniformly stirring the
vegetable oil, the bio-
alcohol and the mutual
solvent in a reaction kettle, adding the
solid base catalyst into the mixture and stirring the mixture to form suspension; and b, heating the suspension to 50 to 70 DEG C, making the
suspension flow back through a condenser, stirring the obtained product for 10 to 90 minutes, cooling the product to the
room temperature, filtering off the
solid base catalyst, then sequentially adding the bio-diesel, the
fatty acid, the
combustion accelerant, the combustion improver, the
oxygenate and the detergent and stirring and reacting the mixture for 20 to 30 minutes to obtain the biomass fuel oil. The biomass fuel oil provided by the invention has the advantages of high combustion value, high lubricating property and high
flash point.