It is essential to analyze the risk influential factors and evaluate the operational risk status for power communication network so as to identify the risk of the power communication network and guide the operation and maintenance work. First, based on the systematic analysis of the risk influential factors of power communication network, the risk evaluation index system with three-level hierarchical structure is established. Then, the quantitative risk evaluation model for power communication network is constructed based on matter-element extensible model and analytical hierarchy process theory. Through applying the model to a certain practical power communication network, the risk level for each influential factor and the whole network can be obtained. The evaluation results can provide positive and instructional significance for generally identifying the vulnerabilities in power communication network operation process, guiding the operation and maintenance work, and promoting the differentiated management and scientific decision-making for power communication network. This work is supported by Fundamental Research Funds for the Central Universities (No. 13MS64) and Science and Technology Project of State Grid Corporation of China (No. XXB51201501250).