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The traditional CO2 removal method with 5A zeolite molecular sieve will lose efficacy because of the strong affinity with the water vapor. A hydrophobic ZSM-5 adsorbent was prepared by a mixture of ZSM-5, silica sol, water and additives, followed by processes of extrusion, drying and then hydrophobic modification. The structures and properties of the adsorbent were analyzed by N2, H2O/CO2 adsorption isotherms and XRD analysis methods. The prepared adsorbent has multilevel pore structure, high BET specific surface area (296 m²/g) and better CO2 adsorption performance, as well as excellent hydrophobicity, and the H2O equilibrium adsorption capacity is about 1% of weight even under the condition of 90% relative humidity. [ABSTRACT FROM AUTHOR]