in recent years, the problem of China"s high monetization rate has become more and more serious. Scholars focus on finding the reasons behind it, but ignore the research on the relationship between the monetization rate and economic growth, how the monetization rate affects economic growth, and in what range the monetization rate is the most favorable for economic growth. Therefore, on the basis of summarizing the relevant theories about the influence of monetization rate on economic growth, this paper puts forward the theoretical hypothesis that there is an inverted U-shaped relationship between monetization rate and economic growth. And select the panel data of 72 representative countries in the world from 1996 to 2018 to conduct an empirical test on the relationship between monetization rate and economic growth. The results show that: the full sample and the sub-sample data of developed countries show that there is an inverted U-shaped relationship between monetization rate and economic growth. At present, the level of monetization rate in China is less than the inflection point of the whole sample data and greater than the inflection point of the developed countries" sub sample data Point value. The sub sample data of developing countries show that there is a positive U-shaped relationship between the monetization rate and economic growth, and all of them are on the right side of the inflection point. Finally, according to the above conclusions, the optimal path map of China"s monetization rate is proposed.