Abstract: Magnesium matrix composites are widely used in various industries and have been studied in depth because of their excellent comprehensive properties, such as low density, high specific strength and high specific modulus. This paper mainly reviews the reinforcement mechanism and research progress of SiC on magnesium matrix composites, and finds that SiC can effectively balance the contradictory relationship between strength and plasticity in traditional magnesium matrix composites, and play a good reinforcing effect on magnesium matrix composites. Through the review and analysis, SiC on magnesium matrix composites reinforcement mainly has Orawan strengthening, fine grain strengthening, thermal mismatch strengthening and load transfer strengthening. Meanwhile, the size and distribution of reinforcing particles play a decisive role in strengthening magnesium alloys and determine the strengthening mechanism. For most magnesium alloys, an optimal effect is achieved when the addition of particulate reinforcement is 1 wt%. SiC particles at micro- and nano-scales are more effective in enhancing the mechanical properties of magnesium matrix composites. To achieve high-performance SiC-reinforced magnesium matrix composites, the current optimal methods include melt infiltration, powder metallurgy, stir casting, and high-energy ultrasonic processing. The application of nano-SiC reinforcements in magnesium matrix composites represents a cutting-edge research topic. Through meticulous design and fabrication, it is expected to enhance the mechanical properties, wear resistance, and corrosion resistance of magnesium matrix composites, thus holding broad application prospects in fields such as aerospace, automotive, and electronics.