The invention provides a method for improving a titanium-aluminum laminated composite material structure and improving mechanical performance. Tungsten core SiC ceramic fibers are pre-treated, and NiTi alloy wires, Ti foil and Al foil are subjected to ultrasonic cleaning; the Ti foil, the tungsten core SiC ceramic fibers, the NiTi alloy wires and the Al foil serve as a unit to be stacked according to the sequence of the Ti foil, the tungsten core SiC ceramic fibers, the NiTi alloy wires, the Al foil and the Ti foil, the four SiC fibers are placed between every two NiTi alloy wires, the interval is 1 mm, and the upper surface and the lower surface are both the Ti layers; and sintering is conducted on the unit through a vacuum hot pressing device. According to the method for improving the titanium-aluminum laminated composite material structure and improving the mechanical performance, through the design principle that nickel and titanium elements in the NiTi wires easily react with aluminum elements under the low temperature to form inter-metallic compounds, the SiC fibers and the NiTi alloy wires are simultaneously introduced into inter-metallic compound layers through the vacuum hot pressing sintering method, the SiC fibers serve as reinforcing bodies, introduction of the NiTi alloy wires aims to remove inter-metallic compound layer center lines through the sufficient diffusion reaction mechanism of the NiTi alloy wires and Al, and the SiC fiber/base body interface is improved, so that the mechanical performance of a composite material is improved.