Abstract: the thick liquid of bentonite is purified respectively by flocculanting method with inorganic,organic flocculant and the aqueous solution containing acetic acid aftr immersing the shell shrimp.The result obtained shows that:the effect of purifying with this solution is better than with inorganic and organic flocculant,the white extent of the purified bentonite is to 78.6%,the concent of Al 2O 3·SiO 2·3H 2O is to 90.1%.