Water-based adhesive and preparation method thereof

The invention discloses a water-based adhesive and a preparation method thereof. The water-based adhesive is prepared from raw materials such as water-based polyurethane emulsion, a PVA-SbQ solution and soy protein dispersion liquid on the basis of excellent compatibility of the water-based emulsion with other raw materials. The adhesive is good in adhesion; cheap environment-friendly resources such as soybean are utilized sufficiently, and the SbQ gene in the PVA-SbQ structure can be cross-linked under ultraviolet irradiation to form a network cross-linked structure; therefore, the mechanical properties of the adhesive can be improved.