It is of great signif icance to conduct an international comparative study on China’s and other countries’ urbanization by taking the concept of “scale” as a crucial study point. This paper puts forward that countries with an area over two million km2 or a GDP over 650 billion dollars are comparable with China. Accordingly, there are 24 such countries in the world leading the global socio-economic development. For consisting of almost all types of countries, they can be considered as basic references for international comparative studies on China’s urbanization. Based on the relationship between urbanization and economic levels, the 24 countries can be divided into three tiers. The fi rst tier countries are mainly developed countries at high urbanization and economic levels; the second tier countries are later starters yet urbanized at a rapid speed, thus have fallen into the “middle-income trap” because of an imbalanced urbanization and economic development; the third tier countries including China and India are still in the starting phase of urbanization, and the key to their future development is a steady economic growth and a balanced urbanization and economic development. It is of great international representation in international studies on China’s and other countries’ urbanization by taking the concept of “scale” as a crucial study point. This paper puts forward that countries with an area over two million km2 or a There are 24 such countries in the world leading the global socio-economic development. For consisting of almost all types of countries, they can be considered as basic references for international comparative studies on China’s based on the relationship between urbanization and economic levels, the 24 countries can be divided into three tiers. The fi rst tier countries are mainly developed countries at high urbanization and economic levels; the second tier countries are later starters yet urbanized at a rapid speed, thus have into the “middle-income trap ” because of an imbalanced urbanization and economic development; the third tier countri es including China and India are still in the starting phase of urbanization, and the key to their future development is a steady economic growth and a balanced urbanization and economic development.