The invention discloses Ag-loaded antibacterial zeolite and a preparation method thereof. The Ag-loaded antibacterial zeolite is prepared from zeolite, polyvinyl alcohol, a foaming agent, a shape control agent and an AgNO3 solution. The Ag-loaded antibacterial zeolite and the preparation method thereof disclosed by the invention have the beneficial effects that firstly, the polyvinyl alcohol, thefoaming agent and the shape control agent are adopted for modifying zeolite to prepare hollow spherical zeolite hydrogel, and then the loading of Ag ions is performed on the surface of the modified zeolite through irradiation by an ultraviolet lamp; the prepared Ag-loaded antibacterial zeolite not only has the characteristics that the growth and the reproduction of escherichia coli, bacillus subtilis and staphylococcus aureus are inhibited, and the escherichia coli, the bacillus subtilis and the staphylococcus aureus are killed, but also has the advantage of being broad-spectrum antibacterial.