| The urban road network of master city is the inevitable result of urban development, infrastructure and most importantly. It has an irreplaceable role. The structure of urban road network of master city is complex, difficult to manage. Complex network of road network characteristics and reliability study is to provide solutions to relevant technical staff and management of road network in new ways.This article briefly reviews the basic theory of complex networks. On this basis, it explains the main city road network the different modeling methods, combined with its characteristics, to choose the best method to create complex network model. With the urban road network of Chongqing master city, for example, each of its core business district and main city road network model of complex networks, using PAJEK software, rendering complex network diagram. Using the corresponding algorithms programmed in MATLAB software to calculate the data, it analyzes the characteristics of complex networks. These characteristics compared with other urban road network characteristics of complex networks, come to these urban road network characteristics.The urban road network is vulnerable to deliberate attack and the impact of random attacks, leading to road network failure. According to the attacks by these two types of the actual situation, creative proposed road network subject to these attacks on the idea and algorithm simulation. With the urban road complex network model of Chongqing master city, for example, research model subject to these attacks, the ratio of edge fracture with residual road network and the scale of variation of the average path length and schematic drawing. From these characteristics of the performance characteristics of the actual road network, provide a reference for urban road network construction.
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