Abstract: Dental caries is one of the third major non-communicable diseases following the cardio-cerebrovascular disease and tumor.It would affect the function of masticatory，beauty and pronunciation ,even to cause deuteropathy.Early enamel caries is the initialization phase of dental caries,and it is also the critical period to treatment.The prevention and treatment have fluorination method and pit and fissure sealant,however, these strategy has considerable limitations,which limit the clinical application.Infiltration of non-cavitated caries lesions with light-curing resins could lead to an arrest of lesion progression because of its superior physical and chemical performance, gradually attracted widespread attention in recent years.The aim of this study is to discuss the permeability,aging resistant performance and surface micro-hardness of the resin infiltration.