Fatting agent as well as preparation method and application thereof

The invention relates to the technical field of leather, in particular to a fatting agent and a preparation method and application thereof. The fatliquor provided by the invention is prepared from the following raw materials in parts by mass: 5 to 10 parts of ethylene glycol butyl ether, 10 to 15 parts of high alcohol polyoxyethylene ether, 4 to 5 parts of oleic acid, 15 to 25 parts of sulfonated grease, 8 to 12 parts of maleic anhydride and 3 to 5 parts of surfactant. According to the invention, a molecular design principle is adopted, a group with strong binding capacity with leather fibers is introduced into high-carbon alcohol polyoxyethylene ether, and the binding capacity of a product and the leather fibers is enhanced, so that an adsorption film is formed on the leather fibers, the fibers can be well dispersed, and the action between the fibers can be weakened; by adding the surfactant, the sulfonated grease and the like, the fullness and the softness of the treated leather can be improved, and the lea