The economic crisis in 2008 dealt a heavy blow to the developed countries and even the whole world. The long-term stable growth of the western economy was broken, and it is mired into the so-called "high-income trap". This paper argues that the reasons why developed countries fall into the "high income trap" can be summarized as three aspects: internal factors, external factors and fundamental reasons. On this basis, this paper analyzes the response strategies and effects of developed countries, in order to provide a reference for our country to be a high-income country while maintaining sustained and stable economic growth.