The invention relates to a preparation method for a granular Cu3(PO4)2/super P positive electrode material of a lithium ion battery. The preparation method comprises the following steps: obtaining a copper phosphate precursor through a solid-phase method, carrying out stage heating in a muffle furnace, and carrying out full ball milling on Cu3(PO4)2 subjected to heat treatment and super P to obtain the Cu3(PO4) 2/super P composite electrode material. According to the invention, the super P with 'three high performances and one excellent performance' is compounded, namely high specific surfacearea, high structure, high purity and excellent electrical conductivity, so that the problem of poor electrical conductivity of the copper phosphate is improved. The Super P has the good thermal conductivity to ensure the safety and service life of a battery, and the electrical conductivity of the material can be improved. Compared with the prior art, the raw materials are rich, cheap, easily available and safe, high-temperature sintering is not needed in the compounding process, the energy consumption is low, the preparation process is simple, and the application of the composite material isexpected to improve the performance of the lithium ion battery.