The invention relates to a preparation method for a aqueous low-solar-absorptance antistatic coating. The method comprises: (1) preparing a pigment slurry from 15-30 parts of deionized water, 0.1-0.8 part of a neutralizer, 0.2-2 parts of a thickening agent, 0.5-3 parts of a wetting dispersant, 0.1-1 part of a surfactant, 0.1-2 parts of an antifoaming agent, 0.1-0.5 part of an antiseptic and 1-10 parts of a pigment, stirring at a speed of 2000-3000 r/min for 20-30 min to uniformly disperse; (2) adding 30-50 parts of aqueous hydroxyl resin, 25-50 parts of a conductive filling material, 0.1-1 part of an antifoaming agent and 0.2-1.5 parts of a rheological modifier into the pigment slurry and stirring uniformly; (3) performing high-speed dispsersion on the paint slurry for 20-40 min, and controlling the dispersion speed to be 1500-2500 r/min; (4) adding 10-20 parts by mass of aliphatic isocyanate or alicyclic isocyanate; and (5) performing multiple times of spraying, controlling the spraying thickness at every spraying time to be 10-25 mu m and controlling the total thickness of the coating to be 80-150 mu m. The method helps to improve the environment protection performance of the product. The prepared coating has high infrared emissing ability and low solar absorptance, and also possesses excellent antistatic performance, salt-spray resistance, damp heat resistance and ageing resistance.