As an important treatment agent，silane coupling agent is widely used in coatings，rubber，plastics and other fields.In this paper， the structural characteristics and action mechanism of silane coupling agents are reviewed.Several typical applications of silane coupling agents in the field of common coatings are introduced， including compatibilization of matrix resin， surface modification of pigments and fillers，and connection between coating and substrate.The factors affecting the effect of silane coupling agent under different conditions are discussed. The development trend of silane coupling agent application in heat-resistant coatings is prospected.