The surface adsorption capability of Xianrenwan halloysite from Chenxi in Hunan Province was studied through the nitrogen adsorption-desorption experiment at 77.35 K by using such means as surface potential measurement and transmission electron microscope (TEM). The morphology of halloysite is hollow tubule. The isotherm of nitrogen of the adsorbs-desorption for halloysite is typeⅡisotherm. The pore dimension distribution of halloysite by BJH equation is 2.5～200 nm, and is concentrated in the range of 3～40 nm. The micro-pore dimension distribution of halloysite by HK equation is concentrated in the range of 0.6～1.9 nm. The azure halloysite has abundant pores, which are mainly meso-pores and micro-pores. The white hallosite has relatively less pores, being mainly micro-pores, meso-pores and macro-pores. The surface point of zero charge is close to the pH value of 2. Zeta potential tends to be stable at about-40 mV. The halloysite has large specific areas(35～87 m²/g)and abundant pores(16.20～30.12 nm)so that its capacity for gas adsorption and ion exchange is very strong. Priority should be given to the exploitation of the azure halloysite because it has best adsorption capability.