New functional materials mainly refer to terbium dysprosium iron magnetostrictive alloy (Terfenol-D), which has tens of times higher stretching performance than traditional magnetostrictive materials and piezoelectric ceramics, and is therefore called super magnetostrictive materials. Its fast mechanical response, high power density, and large size variation have made breakthrough progress in electromechanical conversion technology, opening up a new era of magnetostrictive materials. Widely used in precision controls such as sonar, fuel injection, liquid valves, actuators, adjustment mechanisms for space telescopes, and wing adjusters for aircraft, it is a rare earth functional material with broad development prospects. It will play an important role in the modernization of cutting-edge science, military technology, and traditional industries.