The invention relates to the technical field of electrostatic flocking adhesives and discloses an electrostatic flocking adhesive and a preparation method thereof. The electrostatic flocking adhesivecomprises butyl acrylate, acrylic nitrile, acrylic acid, N-hydroxymethyl acrylamide, lauryl sodium sulfate, O pi-7, a potassium peroxodisulfate reagent and deionized water. The electrostatic flockingadhesive and the preparation method thereof have the advantages of being stable in quality, low in cost, good in flocking effect, simple and efficient to prepare, and the like, the wearing solidness of a flocking product can be improved, the hand feeling of the flocking product can be improved, and in addition, with the combination of the lauryl sodium sulfate and the O pi-7, the stability of theelectrostatic flocking adhesive can be improved, and the product quality can be improved.