The invention relates to a production method of high-quality sugar, specifically to an improvement of a technology of sugar refinement and purification. High-quality white granulated sugar products are obtained after sugar canes are torn, pressed, cane juice is defecated, mixed juice is heated, a cane sugar complex auxiliary agent is added, the mixed juice is stirred up, floating juice is heated, sedimentated and vaporized, phosphoric acid and the cane sugar complex auxiliary agent are added, syrup is stirred up, the process of honey separation is carried out, the mixture is boiled, refined, crystallized, dried and packed. As the method of the invention adopts a low-temperature technology and a floating treatment method of adding the phosphoric acid, lime and the cane sugar auxiliary agent to lead the floating juice to reach or exceed the effect of the floating juice by original traditional technology, and utilizes a syrup floating principle and a scruff repressing method to substitute the sediment, filtration and stoving technology in the prior art, and cancels such technologies and equipment thereof as filtration, neutralization and sulfur dioxide gas system, retention time in cane juice production process is shortened, sulfur is used as a clarifier during the whole technical process, and sugar without sulfur is produced, thus improving product quality as well as reducing cost.