The key issue of researches on wireless sensor
networks is to balanc the energy costs across the whole network
and to enhance the robustness in order to extend the survival
time of the whole sensor network. As a special complex network
limited especially by the environment, sensor network is much
different from the traditional complex networks, such as Internet
network, ecological network, social network and etc. It is
necessary to introduce a way of how to study wireless sensor
network by complex network theory and analysis methods, the
key of which lies in a successful modeling which is able to make
complex network theory and analysis methods more suitable for
the application of wireless sensor network in order to achieve the
optimization of some certain network characteristics of wireless
sensor network. Based on generation rules of traditional scalefree
networks, this paper added several restrictions to the
improved model. The simulation result shows that improvements
made in this paper have made the entire network have a better
robustness to the random failure and the energy costs are more
balanced and reasonable. This improved model which is based on
the complex network theory proves more applicable to the
research of wireless sensor network.