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Modern market economy is credit economy, the construction of credit system is the important strategic decision that is put forward by the CCP central committee and the state council, "The Outline" of the eleventh five-year plan was written, "taking improving credit record of the loan, taxes, contract performance, product quality as the key point, speeding up the construction of social credit system, building disciplinary system". The region of Yangtze river delta has the most developed market economy and the most powerful economic strength in China, with mutual connection of capital, goods, personnel, technology and information constantly strengthened, Shanghai city, Jiangsu province and Zhejiang province are displaying obvious regional economic integration trend, and this integration will further promote the development of regional social credit system construction. Based on analyzing future development situation, this paper proposed some countermeasures to further improving Yangtze river delta social credit system construction.