Common prosperity is the essential requirement of socialism and an important feature of Chinese modernization. To solidly promote common prosperity, first, we should focus on economic construction, implement the new development concept, promote high-quality economic development, and provide a solid economic foundation for common prosperity; Second, we should comprehensively deepen reform, improve various systems, and provide impetus and institutional guarantee for common prosperity. This paper focuses on the second point. Reform is a powerful driving force for solidly promoting common prosperity Reform and opening up is a new great revolution carried out by the people under the leadership of the party under the new historical conditions. It is a key choice to determine the fate of contemporary China. Reform is the self-improvement of the socialist system. The fundamental purpose is to adjust and change the links or aspects of socialist production relations that do not meet the requirements of the development of productive forces, liberate and develop social productive forces, make the country richer and stronger, make the society more fair and just, and make the people's life better. In the process of reform and opening up for more than 40 years, the Communist Party of China has united and led the people to create the most brilliant achievements in the history of socialist development. The Chinese nation has ushered in a great leap from standing up, becoming rich to becoming strong. Practice has proved that reform is a powerful driving force to promote economic and social development and an important guarantee for the success of socialist modernization. Only by comprehensively deepening reform can we better liberate and develop social productive forces, realize national modernization, enable the Chinese people to live a better life and realize the great rejuvenation of the Chinese nation; Only in this way can we give socialism new vitality, build and develop socialism with Chinese characteristics, and gradually achieve the goal of common prosperity for all the people. Since the 18th CPC National Congress, socialism with Chinese characteristics has entered a new era. China has adhered to comprehensively deepening reform and constantly improving the socialist system with Chinese characteristics, and has made remarkable new achievements in economic and social development. By the end of the 13th five year plan, China's economic strength, scientific and technological strength, comprehensive national strength and people's living standards have jumped to a new level, with a GDP of more than 100 trillion yuan and a per capita GDP of more than 10000 US dollars. In 2021, the GDP will reach 114 trillion yuan, and the per capita GDP will exceed 12000 US dollars, which has exceeded the world average. While such achievements have been made in economic development, remarkable achievements have also been made in adhering to the party's comprehensive leadership, comprehensively administering the party strictly, comprehensively deepening reform and opening up, political construction, comprehensively ruling the country according to law, cultural construction, social construction and ecological civilization construction. All these have laid a good foundation for the gradual realization of common prosperity and provided us with more sufficient practical conditions to solidly promote common prosperity. However, it should also be noted that there are still some challenges to achieve common prosperity. The main problem is that the problem of unbalanced and insufficient development is still prominent. The specific manifestations are as follows: first, there is a large gap between urban and rural areas, regional development and income distribution. Although the per capita disposable income ratio between urban and rural areas has decreased year by year in recent years, it is still 2.50 in 2021; Second, the income gap between urban and rural residents is large; Third, the proportion of middle-income groups is too small; Fourth, the enjoyment of education, medical care and social security is unbalanced; Five, covid-19 is affected by the impact of the new crown pneumonia and the external environment. The current economic development is also facing three pressures, namely, demand contraction, supply shocks and expected weakness. This shows that solidly promoting common prosperity is a long-term task. On the new journey, in order to better meet the people's growing needs for a better life and gradually realize the common prosperity of all people, we must further deepen reform in an all-round way, so as to provide a stronger driving force and institutional guarantee for promoting high-quality economic development and promoting the common prosperity of all people. Adhere to and improve the basic socialist economic system in the reform practice The overall goal of comprehensively deepening reform is to improve and develop the socialist system with Chinese characteristics and promote the modernization of the national governance system and governance capacity. The fundamental purpose is to continuously meet the growing needs of the people for a better life and gradually realize the common prosperity of all the people. Focusing on such goals and objectives, we should, on the basis of decades of reform and based on the greatest reality that China has been in the primary stage of socialism for a long time, adhere to the major strategic judgment that development is still the key to solving all China's problems, focus on economic system reform, build a higher-level socialist market economic system, and promote the adaptation of production relations to productivity and superstructure to economic foundation, Promote sustained and healthy economic and social development. The 19th Plenary Session proposed that the socialist economic system and the socialist market system should coexist in accordance with the basic development level of the socialist economy, and that "the socialist system of public ownership and multiple forms of distribution should be the main body of China's socialist economy, which should not only adapt to the development level of the socialist economy, but also reflect the superiority of the socialist market system". Practice since the reform and opening up has proved that adhering to and improving the basic socialist economic system is conducive to the enthusiasm and creativity of the whole society, the development of productive forces, the gradual realization of common prosperity and the better satisfaction of the people's needs for a better life. The system of public ownership as the main body, the common development of various ownership economies and the coexistence of various distribution modes with distribution according to work as the main body needs to be realized in practice through scientific principles and policies. In the practice of reform and development, these principles and policies include: unswervingly consolidate and develop the public economy, unswervingly encourage, support and guide the development of non-public economy; Some people are allowed to get rich first by honest labor and legal management. At the same time, if they get rich first, they should bring and help the later, so as to achieve common prosperity. It should be emphasized that to further implement these principles and policies in the practice of reform and development, we must adhere to two points. In terms of ownership, we should not only adhere to public ownership as the main body, but also adhere to the common development of various ownership economies; In the distribution system, we should not only adhere to the distribution according to work as the main body, but also adhere to the coexistence of multiple distribution methods. Reflected in the distribution policy, we should not only adhere to the distribution according to work, but also improve the distribution policy according to factors. Because in various ownership economies, people have different amounts of production factors, the result of the participation of production factors in the distribution will inevitably lead to the problem of getting rich first and then getting rich. In order to make the gap between getting rich first and getting rich later not too large, we should not only allow some regions and individuals to get rich first by honest labor and legal management, but also guide the regions and individuals who get rich first to help and drive the regions and individuals who get rich later to achieve the goal of common prosperity. In practical work, the understanding of the above policies cannot be simplified and one-sided. Specifically, the policy of "getting rich first" includes three meanings: first, allowing some regions and individuals to get rich first; second, the premise of getting rich first is to rely on honest labor and legal management; third, the regions and individuals who get rich first should help and drive the regions and individuals who get rich later to achieve common prosperity. Now we should put the gradual realization of the common prosperity of all the people in a more important position. Of course, policies should be developed and improved, but the fundamental principles have not changed. As long as we rely on honest labor and legal operation, no matter what form of ownership, whether individuals or enterprises, should be encouraged, supported and protected. Here, the key is honest labor and legal operation. If it is not honest labor and legal operation, whether rich or not, it is not allowed. As for how to realize the regions and individuals that get rich first and drive the regions and individuals that get rich later, we have explored and accumulated some experience, such as increasing the intensity of financial transfer payment and strengthening the poverty alleviation cooperation between the East and the West. Recently, it has put forward "building a basic institutional arrangement for the coordination and matching of primary distribution, redistribution and tertiary distribution". The existing good experience should be carefully summarized, so as to better apply and further improve it in solidly promoting common prosperity. For the newly proposed "three distributions", we should timely study the new situations and problems encountered in practice, and actively explore the ways and means to realize them. Developing the socialist market economy and establishing and improving the socialist market economic system are great creations in the process of China's reform and opening up. To deepen the reform of the economic system and promote common prosperity, the most important thing is to accelerate the improvement of the socialist market economic system, give full play to the decisive role of the market in the allocation of resources and give better play to the role of the government. We should deepen enterprise reform and enhance the vitality of market players; Deepen the reform of the market system and market mechanism, and accelerate the construction of a national unified market; We will deepen reform in the macro sector and accelerate the transformation of government functions. To deepen enterprise reform and promote common prosperity, the most important thing is to establish and improve a modern enterprise system with Chinese characteristics, enhance enterprise vitality and do a good job in primary distribution. Enterprises are the most important market players. They are not only the main force to achieve high-quality economic development and expand the "cake", but also the main force to solidly promote common prosperity by dividing the "cake" through initial distribution. The benefits and initial distribution of market players are very important to achieve high-quality development and common prosperity. To comprehensively deepen enterprise reform, it is undoubtedly necessary to carry out classification, but the goal is to establish and improve the modern socialist enterprise system with Chinese characteristics, strive to explore the realization forms of common development of the economy with public ownership as the main body and multiple ownership, and cultivate market subjects with vitality and creativity. We should deal with the relationship between fairness and efficiency on the basis of trying to improve the efficiency of enterprises. In view of the low proportion of labor remuneration in the initial distribution, we should gradually increase the proportion of labor income in the initial distribution in order to narrow the distribution gap within enterprises. To deepen the reform of market system and market mechanism and promote common prosperity, the most important thing is to build a unified national market, form a unified, open and orderly market system, give full play to the role of market mechanism and make the market play a decisive role in resource allocation. Accelerating the construction of a national unified market is not only the internal requirement of building a high-level socialist market economic system, releasing market potential, stimulating development momentum, promoting stable economic operation and promoting high-quality development, but also an important measure to create and lead demand with high-quality supply, make all links of production, distribution, circulation and consumption more unblocked, accelerate the construction of a new development pattern and realize common prosperity. We should focus on solidly promoting common prosperity, accelerate the construction of a unified national market that is efficient, standardized, fair competition and fully open, establish a unified national market system and rules, rectify the market order, and promote the smooth flow of commodity factor resources on a larger scale. In particular, we should give full play to the role of market mechanism, create a unified factor and resource market, improve the unified land and labor market in urban and rural areas, accelerate the development of unified capital market, accelerate the cultivation of unified technology and data market, build a unified national energy market, cultivate and develop a unified national ecological environment market, and promote the high-level unification of commodity and service markets. Focus on areas of concern to the people and market players, and strive to improve quality and efficiency