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Uses a unique dual-alloy method, control and auxiliary liquid alloy composition so that it can be a good infiltration 2:14: a phase particles, auxiliary liquid alloy in 2:14: one phase is formed around a relatively uniform grain-rich phase thin layer to reach the purpose of increasing the coercivity. Further, controlling the sintering temperature and time, so that the auxiliary liquid alloy does not enter the main phase of the rare earth element, on the one hand so that the main phase of the epitaxial layer has a high anisotropy, on the other hand does not lead to reduced Js main phase, whereby integrated high performance magnets (high Br, Hcj). Magnet direct-drive wind turbines require a high overall performance to withstand harsh working environments and long life.