Abstract: In order to improve the adsorption of heavy metal pollutants by natural adsorbents such as zeolite, and expand the application scope of the new functional material layered double hydroxides (LDHs), Fe-LDHs modified zeolites were prepared by hydrothermal coprecipitation method, and loaded on the surface of the zeolite immediately. Scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray diffractometer (XRD) were used to characterize the surface morphology, chemical composition and crystal structure of the zeolite before and after modification. The isothermal adsorption, desorption, adsorption kinetics, adsorption thermodynamic tests, adsorption tests under different pH condition and competitive ions were conducted to investigate the differences in Cd(Ⅱ) adsorption mechanisms and adsorption efficiency of modified and original zeolite. The results showed: (1) The adsorption process of Cd(Ⅱ) by Fe-LDHs modified zeolites were fitted to Langmuir and pseudo-second-order kinetic model, while original zeolite was fitted to Freundlich and pseudo-first-order kinetic model better. (2) The isothermal adsorption results showed that compared with original zeolite, the Cd(Ⅱ) adsorption ability of Fe-LDHs modified zeolites was significantly improved, and the theoretical maximum adsorption capacity of MgFe-LDHs modified zeolite was higher. (3) The results of adsorption thermodynamic experiment showed that the adsorption of Cd(Ⅱ) by zeolite before and after modification changed from exothermic process to endothermic process. (4) Adsorption time, competitive ions and pH all had effects on the adsorption. The study showed that the theoretical maximum adsorption capacity and the ability to adsorb Cd(Ⅱ) by the MgFe-LDHs modified zeolite was significantly improved. MgFe-LDHs modified zeolite can be recommended as an effective filter medium for the removal of Cd.