Zeolite modified by lanthanum compounds would be an excellent water purification agent that can simultaneously remove both cations and anions in aqueous solution. For this purpose, a novel adsorbent was prepared by loadiag lanthanide on the zeolite, and the optimum manufacturing conditions were achieved. The concentration of the modifying solution was 0. 5 M, in which zeolites should be kept for 2 hours. The applicable solid/liquor ratio was 1:25 at pH10, and the sample was sintered at 600 ℃ for an hour. In addition, the adsorption capacity of modified zeolite for removing different anions from aqueous solution and its regeneration were also investigated. The results indicate that high performances of the novel adsorbent make it possible to be manufactured in industry.