In order to deeply understand the cascading failure effect of the airline network under deliberate attack, the invulnerability of the airline network under different load conditions is systematically studied.Firstly, the node load and capacity of the airline network are defined, the cascading failure process of the airline network is modeled, and three states of nodes are defined, that is, normal, congestion and failure.Then, according to the operation characteristics of the airline network, three kinds of initial loads are proposed, and their effects on the survivability of the airline network under two kinds of load reallocation schemes are studied.The simulation results show that when the actual flight volume is taken as the initial load of the node, the airline networks invulnerability is better than that under the traditional initial load allocation scheme.Compared with the traditional load allocation scheme, the excessive load reallocation scheme can effectively alleviate the effects of cascading failure.The results show that the initial load scheme based on the actual flight volume can effectively test the rationality of the traditional load allocation model.The results also reflect that the traditional initial load settings cannot fully reflect the characteristics of the network nodes, and further optimization is needed to better reflect the survivability of the real network.