Abstract: Network structure enhancement is a new composite material reinforcing method, its characteristics is a three dimensional interpenetrating network structure formed in composite by the reinforcement phase and the substrate. The toughness of the reinforcement phase is improved by the interpenetrating ductile substrate, while the strength of the substrate is enhanced by the hard network structure reinforcement phase as framework to playing a role of rigid load. The preparation process, characteristics and microstructure of network reinforced metallic matrix composites was reviewed, and the mechanical properties, thermal properties, tribological properties and development trends on the composite are also emphatically introduced.