The alloy sheet is a semi-finished product of NdFeB, and this year's production process has increased the use of belt rejection furnace, which is mainly used for smelting various rare-earth permanent magnetic materials and alloy smelting, and is one of the processes for the production of NdFeB. The rare earth raw material ferroboron can be made into alloy sheet after belt rejection furnace. The alloy sheet contains 30% ~ 40% rare earth elements such as praseodymium, neodymium, terbium and dysprosium. The alloy sheet can be used to make permanent magnet materials, hydrogen storage alloy powder, etc.