The invention relates to the field of papermaking, and particularly relates to a preparation technology of light coated paper and a coating coated on the paper. The preparation technology comprises the steps of preparation of chemi-mechanical pulping size and market pulping size, manufacturing of body paper by the chemi-mechanical pulping size and the market pulping size, treatment process of squeezing, drying and hard calendaring on the body paper, coating process of the body paper, and treatment process of drying and super calendaring after the coating process, wherein the pH value of the coating coated on the light coated paper ranges from 8.5 to 9.0, the solid content of the coating ranges from 62% to 65%, and the configured coating is coated on the body paper in a machine. The light coated paper prepared by virtue of the preparation technology and the coating is good in surface strength, paper gloss, printing gloss and printing adaptability, can ensure that printed products have bright colors and clear lattice points and are good in paper stiffness and machining performance, and is applicable to various types of printers as well as rotary printing at a high speed.