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A method of manufacturing magnetic particles is provided. The method of producing the magnetic particles is a first precursor comprising a rare earth element, A second precursor comprising a metal element, and a dispersion is a step of preparing a mixed source solution, by hydrolysis the source solution, forming an oxide particle comprising the rare earth element and the metal element, the step of preparing the base particles by coating an additive containing calcium in the oxide particles, by disembarking the base particles, the additive is a step of preparing a pre-magnetic body in which the pyrolysis calcium oxide (CaO) and the oxide particles are reacted to, And by reducing the preliminary magnetic body, it may include a step of producing a magnetic particle comprising a compound of the rare earth element and the metal element.