The invention discloses a method for preparing plastic particle master batch through a magnetic material. The method comprises the steps of (1) adding nylon into a nylon solvent, stirring till nylon is completely dissolved to obtain a nylon solution, and weighing the following components by mass percent content proportion for standby application : 80-90% of magnetic powder, 9-17% of the nylon solution, 0-1-3% of a surface treating agent and 0.05-0.1% of a lubricating agent (the sum of the mass percents of all the components is 100%); (2) after 30-40 min, adding the nylon solution and the lubricating agent, and mixing for 10-20 min; and (3) carrying out banburying on the mixed material through adopting an internal mixer, and crushing through a jaw crusher, so as to obtain the plastic particle master batch prepared through the magnetic material. According to the method, the technological steps are simple, nylon is added in a nylon solution manner, and nylon and the magnetic powder can be fully combined, so that nylon and the magnetic powder are combined without high temperature heating grAluminium-silicon compositeanulation, the energy consumption is reduced, the magnetic powder is prevented from being oxidized due to high temperature, and the shaping is easy.