The invention provides an acrylic acid Guerbet alcohol ester and a preparation method and application thereof, and belongs to the field of an acrylic acid alcohol ester and preparation thereof. According to the invention, acrylic acid and Guerbet alcohol are adopted as raw materials; a catalyst is toluene sulfonic acid or SO4<2-> / MxOy type solid superacid; and after full reaction, rotary steaming, filtering, washing and drying are preformed to obtain liquid acrylic acid Guerbet alcohol ester. The method is simple to operate, higher in esterification rate, economical, applicable and convenient for industrial production. The acrylic acid Guerbet alcohol ester is a novel high-molecular monomer; and the acrylic acid Guerbet alcohol ester, a homopolymer of the acrylic acid Guerbet alcohol ester, and a copolymer of the acrylic acid Guerbet alcohol ester, phenethylene, maleic anhydride, vinyl acetate and the like can be extensively applied to the field of preparation of coatings, adhesives, refined oil product flowability modifiers, raw oil pour point depressants, biomedical compatible materials and the like.