The invention relates to a preparation method of a titanium-coated anode, and belongs to the technical field of hydrometallurgy electrodeposition. The preparation method comprises the following stepsof (1) preparing a mixture of hydrated IrCl3, TaCl5 and concentrated HCl; (2) removing oil from a titanium plate, and cleaning and drying the titanium plate; (3) uniformly coating the surface of the titanium plate with the mixture of hydrated IrCl3, TaCl5 and concentrated HCl, and conducting drying; (4) roasting the dried titanium plate in the presence of oxygen; and (5) taking out the roasted titanium plate, and cooling the roasted titanium plate to room temperature to obtain the titanium-coated anode. According to the preparation method, the surface of the titanium plate is coated with a coating material, and the coated anode is obtained through drying and roasting, so that the technical problems of short service life of an electrode material, low purity of cathode deposited metal, highdirect current power consumption and the like in the hydrometallurgy electrodeposition processes such as zinc electrodeposition and copper electrodeposition can be solved, the service life of the electrode material is prolonged, the quality of the cathode deposited metal is improved, and the economic benefits of enterprises are effectively increased.