Insurance, guarantees, banks and other financial institutions are important parts of building the financing system of SMEs. This article from the perspective of the insurance talked the necessity of insurance involved in SME financing. In order to study the influence of insurance intervene SME financing, by selecting the industrial SME data and credit guarantee insurance data of 31 provinces, autonomous regions and municipalities from 2005 to 2011, build individual fixed effect panel data model, use insurance this factor as the explanatory variable, to consider the impact on insurance intervene SME financing. The results show that the involvement of insurance has a positive role on SME financing, then build a bidirectional fixed effect panel data model. The innovation point of this paper is quantization of insurance factors. Finally, put forward several policy suggestions to solve the SMEs financing.