With ultra-high invulnerability of the requirements of the network, how to use incremental deployment of resources in order to enhance their business planning configuration way dynamic recoverability, a combined network growth planning algorithm for dual link faults(CA-DF strategy) is proposed, integer linear programming(ILP) model is established, and a simula-tion calculation was carried out. The simulation results show that CA-DF strategy can effectively improve the dynamic recovery rate under dual-link failure while adding as few network resources as possible.