The invention discloses a thermal spraying rare earth alloy coated rebar. A thermal spraying mode is adopted, through the steps of mechanical derusting, thermal spraying, post-processing and the like,a rare earth alloy wire is sprayed onto the surface of a rebar substrate to prepare the thermal spraying rare earth alloy coated rebar, the rare earth alloy wire is mainly composed of Zn and Al and evenly added with Si, Li, Cu, Zr, V, Ti, B, Mn, rare earth metals and the like, and the hardness, plasticity and toughness of alloy and a coating as well as the shielding performance and cathode protection performance of a metal thermal spraying coating are improved; a two-component water-based polyurethane sealing agent and finish paint are adopted for processing, and the surface of the rebar canbe compatible with and adhere to concrete more easily; and the production effect is improved by adopting production lines of a structure in a cross shape, in a shape like the symbol '*', in a shape like the Chinese character 'mi' and the like. According to the thermal spraying rare earth alloy coated rebar, the common technical problems that at present, the relative adhesion strength between epoxycoated rebars and concrete as well as between zinc-aluminum coated rebars and concrete is substantially reduced, the anchorage length of the rebars is increased by 25%, the corrosion resistance and the durability are poor, and notches and damaged positions are difficult to repair on site are solved, and the good application prospect is achieved.