The complex property of urban public transport network rises from its intrinsic evolutional mechanism. Three models are established which are respectively public transport stop network, transfer network and transport line network. An analysis of the basic network characteristics of these models including degree and degree distribution, average path length and clustering coefficient is completed. Moreover this paper puts forward a method for searching for the public transport network Hub node. This method not only combines the global efficiency and local efficiency, but also provides a quantitative index of how to improve the public transport network robustness and fragility. Finally this paper looks at the public transportation network of Guilin City and confirms the effectiveness and practicability of this method.
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