Because of their lower density, good surface-to-volume ratio, tensile strength, and thermal conductivity, CNTs have been used to create high-strength MMC (metal matrix composite). While dealing with CNT, uniform dispersion is the most critical aspect. Therefore, proper usage of processing technique and amount of reinforcement plays a key role in providing the uniform composition of powder in the matrix throughout. Adhering/Controlling the amount of CNT in the Magnesium-based matrix material attributed to the more refine microstructures and high strength of the MMC.Among the various fabrication approaches, Powder metallurgy entails the homogenous dispersion of the CNT in the matrix materials indicating the improvement in the mechanical behavior and the micro-structure characteristics of the composite. The review papers highlight the various aspects of CNT (Carbon Nanotube) in Mg-based matrix material while dealing with microstructure and mechanical behaviour analysis of Mg-MMC.