Aggregated economy theory is the classical principle of urban and region economy theory while aggregated economy effect is the basic effect during the process of urbanization.
聚集经济原理是城市和区域经济理论中的经典思想，聚集经济效应是城市化过程中的基础效应。
2
Based on the theory analysis of the economic increasing effect of urban scale agglomeration, the paper gives a research on Chinese urbanization and the existing system of city's population scale.