The absorption capability, the regeneration capability and the influencing factors of the clinoptilolite to ammonia nitrogen are studied through static state test ,dynamic test and regenerative test. The experiment result indicates that the saturated adsorptive quantity of clinoptilolite in the static state is 3 100 mg/100 g,when the concentration of ammonia nitrogen is 35 mg/L, the saturated adsorptive quantity in the dynamic state is about 2 200 mg/100 g, and was 20, 23 and 27.5 times of the pulverous active carbon's, the granular active carbon's and the diatomite's respectively. The mixed solution of NaCl+NaOH (the weight proportion is 3:7) could be repeatedly used three times as the regeneration reagent of clinoptilolite, and the effective life is exceeded 140 h. Clinoptilolite has important practicality when it is used to dispose the wastewater containing ammonia nitrogen.