Taking the market integration as the core to promote the construction of Yangtze River Delta integration is conducive to the formation of regional unified market and super large-scale market advantages. It benefits for the siphon of global advanced factors to achieve innovative driving forces and industrial upgrading, and also the construction of new globalization model based on domestic demand. As a result, it can promote China’s economic transformation and high-quality development. Therefore, the integration of the Yangtze River Delta is not only a regional economic development problem, but also a strategic choice related to China's overall economic situation. The key is to take the competition policy as the institutional cornerstone to promote the market integration in the Yangtze River Delta. The pattern of "administrative region economy" is the main factor which causes China's potential super large-scale market advantages not being able to work. To realize the higher quality integration of the Yangtze River Delta, we are required to break the "administrative region economy" and implement the unified market construction.The difficult and fundamental of promoting the market integration in the Yangtze River Delta lie in the governance mechanism. In accordance with the requirements of the socialist market economy development, we should take the competition policy endogenous in the developed market economy as the means and mechanism to promote the high-quality development of the regional market integration in the Yangtze River Delta.
