Abstract: White carbon black was produced by precipitation method with sodium silicate and sulfuric acid as raw materials.Effects of reaction temperature on surface area and DBP absorption oil value were discussed.Meanwhile,influences of various factors,such as density of sodium silicate,concentration of sulfuric acid,pH,and steam on quality of products,were also discussed.Physical performances,such as vulcanization time,500% stress at definite elongation,intensity of elongation,elongation at break of the rubber were measured when doping white carbon black with different surface areas and DBP into it.Based on research results the improvement on production technology of precipitated white carbon black was carried out.By optional regrouping the reaction conditions,a series of white carbon black products with different surface areas can be gained and thus more consumers′ needs can be satisfied.