Abstract: To understand deeply the nonmetal ion adsorption ability of kaolinite and acidic-kaolinite, this paper studied the effects of kaolinite and acidic-kaolinite on disposing water holding Cr, NH3-N and F, and built the adsorption model by using laboratory analysis. The results showed that, with the contents of Cr, NH3-N and F increased, the adsorb capacity of kaolinite and acidic-kaolinite increased, but different adsorb material had different effects on different ions, kaolinite had better effect on removing Cr and NH3-N than acidic-kaolinite, and kaolinite could remove more Cr than NH3-N, acidic-kaolinite had better effect on F adsorption. The adsorption of Cr, NH3-N and F by using kaolinite and acidic-kaolinite fitted Freundlich equation, Langmuir equation and Tekmin equation, and Freundlich equation was the best to state these adsorptions.