Abstract: This paper studied on the technical process of "hydrochloric acid activation, alkali dissolution and neutralization precipitation" to prepare White Carbon form EZhou bentonite, made of high whiteness and fine granularity of White Carbon,and the value of the white degree is 95.46%,the particle size is 200nm. The optimum technological condition included that concentration of acid is 20%, the time activating is 150min, dosage of alkali is 0.35g/g, dosage of ethanol is 2mL/g,and dosage of sodium chloride is 0.05g/g.The research result indicated that joining ethanol and sodium chloride control the granularity of White Carbon.