Nianzishan District of Qiqihaer City was awarded the title of "Hometown of Chinese Maifan Stone" by the Committee of Chinese Hometown of Specialty in 2001. In this paper, the specific surface and pore properties, cationic exchange capacity(CEC) and pH buffering capacity of the Nianzishan Maifan Stone were tested and analyzed to reveal the basic structural and functional performances of Maifan stone; in this way, the adsorption performances of Nianzishan Maifan Stone for Pb²⁺, Cd²⁺ and Cr³⁺ can be explored respectively. It is indicated that Nianzishan Maifan Stone shows a cationic exchange capacity(CEC) of 13~20 mmol/100 g, with the sponge macro-porous structure. The pH values of acid and alkali solutions can be adjusted to a neutral point efficiently when the Nianzishan Maifan stone is added, especially for the acid solutions. The heavy metal adsorption performances of Nianzishan Maifan Stone are Pb²⁺ > Cr³⁺ > Cd²⁺.