The invention relates to a preparation method of a
biofuel oil energy-saving agent. The
biofuel oil energy-saving agent is prepared through degrading a
chitin derivative
chitosan (extracted from
marine organism) through an auxiliary
enzyme so as to obtain micro molecular
chitosan, dissolving the micro molecular
chitosan in an
organic acid, fermenting so as to obtain a semi-finished product, adding the semi-finished product into mixed liquid of
alkane, aromatic hydrocarbons and naphthenic hydrocarbons, fermenting again, and filtering. The
biofuel oil energy-saving agent reduces the
fuel oil consumption caused by incomplete
combustion, increases the calorific value and greatly saves the
fuel oil; an effect of protecting machines is achieved, and the biofuel oil energy-saving agent can decompose deposited carbon and colloids produced in
fuel oil application, so that the inside of an engine is cleaned, thereby significantly prolonging the service life of the engine; and the
exhaust emission is reduced, the environment is protected, the biofuel oil energy-saving agent can increase the cubical content of
oxygen and the combusting degree of oil in fuel, and through the complete
combustion of the biofuel oil energy-saving agent, the emission of harmful gases is reduced, thereby protecting the environment.