A new direction for urban geography research is fractal study．Chongqing’S urban system has characteristics of the fractal model，which咖be applied to analyze the scale structure and spatial structure of Chongqing urban system．According to the analysis， the scattered characteristics and its primary rmio of Chongqing’S urban system is not reasonable，which means the intermediate cities are over—centralized：the population has an equilibrium distribution but in low levels；for special structure，the special relevan cy is not adequate，an d the interactive intensity is not great