Abstract: The natural clinoptilolite ores in China are widely distributed and rich in reserves, which are of great value for development and utilization. However, due to the difference of mineralization conditions, the composition, structure and properties of natural clinoptilolite from different places or even from different blocks in the same place have some differences, which affects its practical application. Therefore, it is necessary to investigate and compare the composition, structure and properties of natural clinoptilolite ores. The natural clinoptilolite ores from one place in Hebei (Z1) and two places in Liaoning (Z2 and Z3) were selected to study and compare their composition, structure, pH value, cation exchange capacity, and adsorption properties on heavy metal ions, water vapor and formaldehyde vapor. The results showed that the three natural zeolites were mainly composed of clinoptilolite, quartz and a small amount of calcite, and they contained SiO₂, Al₂O₃, K₂O, Na₂O, Fe₂O₃, MgO, TiO₂, CaO and a small amount of heavy metals. There were some differences in the mineral and chemical composition of the three samples. The Z2 sample showed relatively high adsorption efficiency of heavy metal ions, water vapor and formaldehyde gas, with the adsorption capacities of Cd²⁺, Cr³⁺, water vapor and formaldehyde gas for 14.89 mg/g, 6.65 mg/g, 21.33 mg/g and 7.12 mg/g, respectively, and this was related to its higher specific surface area, mesoporous volume and cation exchange capacity. This study provides some support for the selection, efficient utilization and environmental application of natural clinoptilolite ores.