The invention discloses a preparation method of an easy-to-polish waterborne vacuum plastic suction adhesive. According to the preparation method, after vinyl acetate, butyl acrylate and maleic anhydride are subjected to random copolymerization, acrylonitrile is subjected to block polymerization; after an initiator is removed through a polymeric reducing agent, and is matched with self-emulsifiedpolyurethane dispersion, a de-foaming agent, a wetting agent, a thickener and the like to obtain the easy-to-polish waterborne vacuum plastic suction adhesive. The easy-to-polish waterborne vacuum plastic suction adhesive disclosed by the invention has good polishing performance, strong bonding power and good heat resistance and has stable performance under normal storage conditions.