The natural heulandite in Hebei Province was selected as the typical to explore its adsorption mechanism under condition of high ammonia nitrogen in wastewater and to determine the optimal regeneration method for saturated heulandite by single factor method. The results showed that the adsorption process of ammonia nitrogen on heulandite with particle size range of 50~600 μm complied with the quasi-second order kinetic equation with ammonia nitrogen concentration of 500 mg/L at temperature of 25℃. Particle diffusion and liquid film diffusion were the dominated process of the adsorption. The adsorption capacity of heulandite was 7.81 mg/g at temperature of 45℃. The adsorption isotherm of ammonia nitrogen on the experimental heulandite was fitted well with Freundlich model. Gibbs free energy △G was calculated to be less than zero, indicating that the adsorption of ammonia nitrogen on the experimental heulandite was a spontaneous endothermic reaction. Additionally, the adsorption capacity of heulandite was increased with appropriate increaseing in temperature. The optimal regeneration solvent of the saturated heulandite was 0.1mol/L of NaCl, with which the desorption rate was increased to 79%, and the times of elution and regenerationbe were more than 5.