Coal combustion is one of the most significant anthropogenetic mercury emission sources. The massive discharge of mercury-containing desulfurization wastewater from coal-fired power plants poses a serious threat to human health and the ecological environment. It is urgent to develop efficient and economical mercury ion removal technology from desulfurization wastewater. The magnetic zeolite mercury adsorbent was prepared by extracting aluminum silicon minerals from fly ash, a byproduct of coal combustion. The magnetic zeolite mercury adsorbent was prepared by using the iron minerals in fly ash, in order to solve the problem that the adsorbent was difficult to separate from the waste water after mercury adsorption, resulting in the secondary release of mercury. The synthesized magnetic zeolite was characterized and analyzed by BET, XRD, TEM and other characterization methods. The effects of parameters such as solid-liquid ratio, initial pH of solution, and oscillation time on the adsorption  of magnetic zeolite for mercury ions were systematically studied. The kinetics of adsorption of mercury ions on magnetic zeolites was studied. The results show that the synthesized magnetic zeolite has a spherical core-shell structure, and the magnetic core is evenly wrapped by the zeolite. The specific surface area of the magnetic zeolite is 4.46 m2/g, the most probable pore size is 18.25 nm, which belongs to the mesoporous range. The magnetic zeolite exhibits magnetization hysteresis, its coercivity is about 10 000 A/m, and it can be separated from desulfurization wastewater by external magnetic field. The optimum adsorption con ditions are as follows: the solid-liquid ratio is 5 g/L, the optimum initial pH is 5, and the shaking time is 90 min. Under these conditions, the removal rate of Hg2+ reaches 92%. The kinetic study results show that the pseudo-first-order kinetic model can more accurately describe the variation of Hg2+ adsorption capacity with time, and the fitted equilibrium adsorption capacity is 23.24 mg/g, which is better than that of commercial activated carbon mercury adsorbents. Magnetic zeolite has good removal  for mercury ions in desulfurization wastewater, which provides a new idea for the refined utilization of coal-fired fly ash.