The latest research status with respect to microstructures, properties and interface behavior of different particulate reinforced magnesium (PRM) matrix composites was reviewed. Based on the problems included in the study of PRM matrix composites, four research orientations in the future are suggested in the present paper, including the development of effective methods to control the interface behavior between reinforced particulates and matrices, the preparation methods of low cost to in-situ fabricate PRM matrix composites, the combination of different processing technologies, and the study of computer simulation technologies for strengthening and failure mechanisms of PRM.