The lacking of holistic analysis in urban planning is urgent in China. This paper start from complexity theory to analyze and study the urban development patterns in urban planning of China cities. This paper analyzes the need of holistic analysis in the process of urban planning. This need is very important for the current process of urban modernization and the building of harmonious society in China. As discussed in this paper, we must make an effort to improve urban planning by virtue of choosing a very clear direction according to the nature of urban planning. From the perspective of different disciplines to understand the city and urban planning, we can able to make a complex system of our city and complex understanding of things deviation reduced, and finally effectively promote the development of the city.