Preparation and application methods of modified paraffin fluoride-free water-repellent finishing agent

The invention relates to a preparation and application method of a modified paraffin fluoride-free water-repellent finishing agent, which comprises the following steps: performing oxidation modification on fully refined paraffin by adopting a non-catalytic oxidation method to obtain oxidation modified paraffin so as to improve the properties such as hydrophilicity, emulsibility, lubricity and the like of the paraffin, and emulsifying the oxidation modified paraffin by adopting a compound emulsifier so as to obtain the modified paraffin fluoride-free water-repellent finishing agent. The preparation method comprises the following steps: preparing an oxidation modified paraffin emulsion which is uniform, fine and smooth, has good fluidity and good stability and can be stored for a long time, then mixing and uniformly stirring the oxidation modified paraffin emulsion and WPU to obtain a water-repellent finishing agent, and finally, carrying out water-repellent finishing on a fabric by using the water-repellent fi