Modern market economy is a credit economy, and there is no mature market economy without a mature credit union. Under the condition of market economy, from the perspective of credit subject, social credit system consists of government credit, enterprise credit and personal credit. Among them, government credit is the cornerstone of social credit, personal credit is the foundation of social credit, and the most critical, active and influential is corporate credit. Because corporate credit is not only concerned by investors or lenders in the financial market, but also by many parties in the general trading market. With the development of economic contracting, enterprise credit will become a prerequisite for cooperation and transaction. Therefore, the construction of enterprise credit system is the top priority of the whole social credit system. Social credit system is also called national credit management system or national credit system. It is a social mechanism, which specifically acts on a country's market norms. It aims to establish a market environment suitable for the development of credit transactions, and ensure that a country's market economy changes to the direction of credit economy, that is, from the original market transaction mode with payment as the mainstream to the market transaction mode with credit as the mainstream. This mechanism will establish a new market rule, enable the formation of social capital, directly ensure the maturity of a country's market economy and expand the market scale of a country. To promote the construction of social credit system, we should strengthen the credit consciousness and concept of the whole society and lay a solid social ethical foundation for establishing and perfecting the social credit system; Accelerate the formulation of relevant laws and regulations, so that the establishment and operation of the social credit system can be based on laws and rules; Promote the commercial operation of social credit system, reduce operating costs and improve service level; Improve the credit supervision and punishment system of dishonesty, and form an effective mechanism to deter dishonesty; Gradually open the credit service market, increase the competitive pressure and development momentum of domestic credit institutions, and promote the establishment and improvement of China's social credit system.