With the quickening of the urbanization process of China, the development of the individual city can not meet demands of urbanization development. The forming of the urban agglomeration becomes the inexorable trend to support further urbanization. Urban agglomeration of Cheng - Yu Economic Zone is the most populous and the largest city group in China and is also the city group with most numerous cities in central and west regions. Based on analysis method of the intensity of city flows, this paper analyzes status quo of space connection of city group in this region and compares it with developed regions in order to accelerate the development and ripe of the city group of Cheng - Yu Economic Zone.