The high-quality development of the private economy promoting the solid advancement of the common wealth is not only the embodiment of the essential attributes of socialism, but also the inherent requirements of the socialist purpose of production. The high-quality development of the private economy promoting the common wealth should adhere to the socialist production purpose of the anchoring direction, developing bigger and better. It is suggested to create a favorable business environment fot the high-quality development of the private economy, in order to promote the common wealth.