MANUFACTURING METHOD OF AN ALLOY POWDER FOR RARE EARTH MAGNET AND THE RARE EARTH MAGNET BASED ON HEA

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A manufacturing method of an alloy powder for rare earth magnet and the rare earth magnet based on heat treatment includes the following : an alloy of the rare earth magnet is firstly coarsely crushed and then finely crushed by jet milling to obtain a fine powder; the fine powder is obtained by being heated in vacuum or in inert gas atmosphere at a temperature of 100° C.˜1000° C. for 6 minutes to 24 hours. The heat treatment of fine powder is performed after the process of finely crushed jet milling before the process of compacting under a magnetic field, so that the sintering property of the powder is changed drastically, and it obtains a magnet with a high coercivity, a high squareness and a high heat resistance.