Abstract: Common prosperity is not only the essential requirement of socialism, but also the strategic goal of socialism with Chinese characteristics. Since the 18th CPC National Congress, common prosperity has been endowed with new connotation and value under the new era background. The Fifth Plenary Session of the 19th CPC Central Committee stressed the "solid promotion of common prosperity". Based on this, grasping the significance of solidly promoting common prosperity from the two dimensions of theory and practice is not only a major theoretical issue, but also related to the practical choice of common prosperity in the new era. In theory, promoting the common prosperity has highlighted the new realm of contemporary Marxism's development, enriched the Marxism's thought of people's free and comprehensive development, highlighted the value core of Xi Jinping Thought on Socialism with Chinese Characteristics for a New Era, and pointed out the direction for shaping the new development pattern and promoting high quality development. In practice, further consolidating the mass foundation of the road identity of socialism with Chinese characteristics is a realistic choice to meet the people's growing needs for a better life and can provide practical guarantee for the smooth implementation of the strategy in the new development stage.

Key words: common prosperity, socialist modernization, new development stage