The present invention relates to a method for producing a high-performance NdFeB / PPS injection molded grain material, which comprises the following steps: dissolving 0.5-2 parts (by weight) of coupling agent in alcohol, adding 100 parts (by weight) of NdFeB magnetic powder, mixing, drying at 40-60 DEG C, grinding and crushing, and then sieving, to obtain coupled NdFeB magnetic powder; dissolving 0.5-2 parts (by weight) of polyvinyl alcohol in deionized water to form clear solution, adding the coupled NdFeB magnetic powder and PPS resin at a certain proportion into the solution, mixing, and drying thoroughly, grinding and crushing, and sieving the dry compound into grains; compounding the grain material, and then cutting, to obtain the NdFeB / PPS injection molded grain material. The NdFeB / PPS injection molded grain material produced doesn't have the phenomenon of separation between NdFeB magnetic powder and PPS resin in the compounding process, can prevent oxidation of the magnetic powder at high temperature, and therefore greatly improves the performance of the injection molded grain material; the producing method is simple and easy to operate.