The invention discloses a preparation method for a component with a Ti/Ti*Al y/Ti multilayer structure and belongs to the technical field of the preparation and forming of metal-based composite materials. The preparation method includes: firstly, using an explosive cladding method to prepare titanium/aluminum multilayer composite material, rolling, leveling, annealing and carrying out heat treatment; secondly, molding the metal composite laminate through a plastic forming method to obtain a component with complex shape; thirdly, putting the component in a die, pressurizing the surface of the component by means of inert gas, heating the component to react and consume the aluminum layer completely to generate a titanium-aluminum intermetallic compound layer, and obtaining the complex component with Ti/Ti*Al y/Ti multilayer structure finally. The preparation method for the component with the Ti/Ti*Al y/Ti multilayer structure overcomes the disadvantage that the traditional method is difficult to prepare the titanium-aluminum intermetallic compound component with complex structure and expands the application field of the titanium-aluminum intermetallic compound; the preparation cost is low, the production efficiency is high, and the engineering application value is very high.