In order to solve the limitation of the traditional complex network vulnerability analysis and improve the performance of the network, a vulnerability analysis method of power communication network based on the business is proposed. A power communication network model based on complex network theory is established. Business importance and business traffic are regarded as the network parameters, under the intentional and random attack strategy, the network vulnerability is measured by the loss of business when some nodes or links failed. And the corresponding vulnerable parts in the network is found. IEEE30-bus test system is used as a simulation example. The result shows that the more concentrated the distribution of business on network is, the higher the network vulnerability is and poorer the network is to withstand cascading failure. What’s more, the network vulnerability is extremely high under intentional attacks. Based on the analysis, a method which can reduce the network vulnerability by changing routing strategy is given. The simulation results show that the method is effective and usable, can provide reference for the planning and maintenance of power communication network, and has practical significance.