The invention relates to white carbon black preparation in the field of chemical engineering, in particular to a method for preparing white carbon black with a precipitation method. The method for preparing white carbon black with the precipitation method comprises the following steps: (1) an n-butanol aqueous solution and sodium chloride are added to a reactor, a water glass solution is added, then a cationic surfactant is added, the mixture is stirred and heated, and the water glass solution, an ammonium chloride aqueous solution and hydrochloric acid are added to the reactor in a continuous parallel flow manner; (2) the pH value of a reaction is controlled to be 8-9 until the water glass solution is all added; (3) the ammonium chloride aqueous solution and hydrochloric acid are added, the pH value is regulate to be 4-5, aging is performed for 2 h, and slurry is obtained; (3) the slurry is filtered, washed with water and washed with ethanol; (5) a filter cake is ground and subjected to microwave drying and calcination, and white carbon black is obtained. The method has the advantages that the pH of the reaction is easy to control and primary particles are not prone to self-polymerization, and the prepared white carbon black has the characteristics of high specific surface area, high main content, high pore volume and the like.