The invention discloses a preparation method and an application of a titanium modified Ti3AlC2 reinforced copper-based electrical contact. The preparation method includes the following steps: cleaningTi3AlC2 ceramic; plating the Ti3AlC2 ceramic with titanium through a multi-arc ion plating process, and obtaining an in-situ generated TiN coating on the surface; pouring Ti3AlC2 ceramic and metal powder mixed at a proper ratio into a die, carrying out cold pressing, sintering, repressing and reheating, and obtaining a Ti3AlC2 reinforced copper-based electrical contact after cooling and de-molding. The titanium element introduced in the invention can form a TiN phase in situ at the interface of a Cu-Ti3AlC2 composite material to enable a Cu substrate and Ti3AlC2 to form metallurgical bondingand improve the interface bonding performance of the composite material. Moreover, the decomposition of Ti3AlC2 can be inhibited by TiN, and the structural integrity of Ti3AlC2 can be ensured. Therefore, the mechanical performance and anti-wear performance of the composite material are improved, and the service life of the electrical contact is guaranteed.