Amorphous alloy is a new type of magnetic conducting material， which is mainly composed of iron， silicon and boron. The metal atoms of amorphous alloy are arranged in disordered amorphous state by rapid freezing and solidification process. It has the characteristics of good ferromagnetism， high mechanical properties， good corrosion resistance， simple manufacturing process and high yield. There are significant differences in physical properties， chemical properties and mechanical properties between amorphous alloys and crystalline alloys. Compared with the traditional silicon steel core， the transformer core made of amorphous alloy is more favorable for magnetization and demagnetization， and the no-load loss is reduced by 80%.