The invention relates to the field of manufacture for magnetic materials, in particular to an industrial cryogenic production method for neodymium, iron and boron nano-crystalline quick-quenched permanent-magnetic powder. The industrial cryogenic production method includes ingredient smelting, ingot crushing, vacuum quick-quenching, magnet crushing, crystallization heat treatment, fine crushing and magnetic performance detection production technological processes. The vacuum quick-quenching process includes that neodymium, iron and boron are heated by electric arcs of a vacuum quick-quenching furnace and are melted to form molten liquid, the overflowing molten liquid is subjected to melt-spinning at the linear speed of 21.5 meters per second by the aid of a molybdenum melt-spinning wheel, a body of the vacuum quick-quenching furnace and a collecting barrel are cooled by constant-temperature water, the constant-temperature water is recycled, and cooling water is used for the molybdenum melt-spinning wheel instead of the constant-temperature water. The industrial cryogenic production method has the advantages that excellent strips can be produced, and the integral magnetic performance can be improved.