Abstract: Different network structures have some influence on the robustness of the network. In view of the different interdependent network structures, the influence of different edge adding strategies on network robust performances are studied. For partial coupling and one-to-one full-coupled networks, different adding edge strategies, i.e. the internal link additional strategy of low relative betweenness and the coupling link additional strategy of low relative betweenness, are proposed respectively and compared with several existing link addition strategies. The simulation results show the effectiveness of the proposed strategies. In addition, the effects of load parameters on link addition strategies are further studied. Simulation results show that with the increase of load parameters, the robustness of the added network is increasing. However, different load parameters may lead to failure of a link additional strategy. Therefore, it is better to improve the robustness of the network by fully considering the value of load parameters and selecting the appropriate adding method. The research results can provide a guidance on how to allocate limited resources to optimize topology of interdependent networks and improve the robustness of interdependent networks