Preparation method of environment-friendly inkjet printing prime coat

The invention discloses a preparation method of an environment-friendly inkjet printing base coat, which comprises the following steps: firstly, adding a waterborne polyurethane dispersion with the solid content of 40% into a reaction kettle, and heating to 60 DEG C; then adding a water-based acrylate dispersion with the solid content of 40%, and uniformly stirring and mixing at 60 DEG C; then adding nano mesoporous silica, and carrying out ultrasonic dispersion for 2 hours; then adding a silane coupling agent and purified water, and adjusting the solid content to 25-35%; the environment-friendly inkjet printing prime coat overcomes the problems that an existing inkjet printing prime coat pollutes the environment and is poor in printing adaptability, and has the advantages that the inkjet printing prime coat is good in ink absorbency, high in adhesion, good in adhesion, free of adhesion and the like, and the environment-friendly inkjet printing prime coat can be used for inkjet printing. The ink is suitable f