NOVELTY - The method involves displacing feeding tank (2) with rare earth permanent magnetic alloy slices into heating dehydrogenation room (23) and heating at specific pressure rate. The feeding tank is displaced into cooling room (27) filled with inert gases, at specific pressure condition. A fan (29) is started to drive inert gases through cambered deflector to cool feeding tank and alloy slices. The heated inert gases are cooled by heat exchanger (30) before blown to cambered deflector to provide inert gas circulating cooling. A material outlet is opened for taking out feeding tank.    USE - Continuous hydrogen pulverization method of rare earth permanent magnetic alloy e.g. melt-spun neodymium-iron-boron (NdFeB) rare earth permanent magnetic alloy used for producing negative electrode of nickel-metal hydride (NI-MH) battery used in electrical tool and hybrid car.    ADVANTAGE - The hydrogen adsorption treatment, heating dehydrogenation treatment, cooling treatment and storage treatment under protection atmosphere are applied on the rare earth permanent magnetic alloy at the same time. The problems to collect magnetic powder from the rotary hydrogen pulverization furnace under protection of the inert gases, a cooling speed is low, an operation period is long and an external-heating muffle furnace takes a lot of power, are solved. Continuous production is provided under vacuum and inert protection atmosphere. Under a condition of saving power, production capacity of rare earth permanent magnetic alloy is increased, the consistency is sufficient, an oxygen content of the pulverized powder is reduced, a proportion of single crystal in the powder is increased and the performance is increased, while enlarging life duration and shortening maintenance period.    DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for a production device of rare earth permanent magnetic alloy.    DESCRIPTION OF DRAWING(S) - The drawing shows a schematic view of the rare earth permanent magnetic alloy hydrogen pulverization device.    Feeding tank (2)    Heating dehydrogenation room (23)    Cooling room (27)    Fan (29)    Heat exchanger (30)