A high whiteness coated paper made from medium whiteness base paper and the coating process and the coating material thereof are provided. The high whiteness coated paper has a whiteness of 86-120% and is produced by coating a base paper, which has a whiteness of 55-83%, with a base coating and a top coating, wherein the base coating comprises (parts by weight): 10-90 parts of heavy calcium carbonate, 10-80 parts of kaolin, 5-20 parts of starch, 0-12 parts of latex adhesive, and 0-10 parts of titanium dioxide; and the top coating comprises (parts by weight): 0.3-2.0 parts of fluorescent whitening agent, 10-90 parts of heavy calcium carbonate, 10-80 parts of kaolin, 8-20 parts of latex adhesive, and 0-1.5 parts of polyvinyl alcohol or sodium carboxymethyl cellulose.
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