Abstract: Light-curing composite resin is widely used in clinical stomatology,but the volume shrinkage and shrinkage stress of the resin in the process of light-curing affect the clinical effects.As the main component of the composite resin,the resin matrix has an important influence on the properties of the resin.The researchers have tried to improve or change the resin matrix to reduce the volume shrinkage and shrinkage stress,enhance the mechanical properties and improve the clinical effects.In this paper,the research progress of resin matrix in recent years are reviewed.

Key words: composite resin, resin matrix, volume shrinkage, shrinkage stress