Traditional critical links identification standards are incomplete and simple in aviation networ. To solve these problems, a comprehensive evaluation index of the links’ comprehensive importance is proposed based on the three network importance evaluation indicators. A double evaluation standard for the increase and decrease of link capacity is established. The effectiveness of the identification method is verified by constructing a network model of air traffic flow distribution model based on UE model. The test results show that the dual capacity identification standard based on the comprehensive importance evaluation index of the flight link can comprehensively and effectively identify the potential key links in the aviation network.