The invention discloses a preparation method for a corrosion-resistant and wear-resistant coating on the surface of a blast furnace energy recovery turbine blade. The method comprises the following steps that (1) cleaning and pretreatment are conducted on 0Cr17Ni4Cu4Nb stainless steel blade substrate materials; (2) supersonic plasma spraying equipment is adopted to spray a Ni-Cr-Re base layer sequentially on the pretreated substrate through an intermittent spraying process under the condition that argon and hydrogen serve as plasma generating gas, and hydrogen serves as carrier gas; (3) a Cr2O3 ceramic interlayer is sprayed on the base layer through the intermittent spraying process under the same condition; (4) sealing treatment is conducted on the coating layer with high polymer; and (5) microstructures and properties of the coating layer are tested after the sprayed layers and the sealed layer are cured. According to the method, the coating materials prepared by the method are metal-ceramic-polymer three-phase composite coatings with high hardness, low porosity, excellent chloride ion corrosion resistance, good structure stability and high adhesion to the substrate.