The way to govern a country starts with enriching the people." Common prosperity is a great goal that our country is striving to achieve at present. Achieving common prosperity not only demonstrates the original intention and mission of our party, but also is an important feature of the Chinese-style modernization path. However, there is still a problem of unbalanced regional development in my country, and the development differences between the eastern, central and western regions are still very large, which increases the difficulty of achieving common prosperity. This paper uses the cross-sectional data of 18 provinces across the country in 2020 to conduct empirical research, deeply explores the relationship between economic complexity, economic growth and regional development imbalance, and tries to put forward corresponding suggestions for this impact.