Aiming at the fact that the current flow indicators in the wireless sensor network (WSN) cascade model cannot correctly reflect the convergence characteristics of WSN, a wireless sensor network cascade model limited by node capacity and link capacity is proposed. First, the network load is redefined according to the new traffic index direction betweenness. Second, the network cascading survivability model is constructed so that the faulty node can recover from the fault state after a certain time delay. Finally, a route recovery mechanism is proposed, which can effectively improve the survivability of network cascading failures, and a simulation comparison test is carried out.The results show that the increase of the node tolerance coefficient λn cannot reduce the damage caused by the cascading failure, but it can delay the occurrence of the cascading process.The larger the link tolerance coefficient λl, the proportion of overloaded nodes will decrease significantly and the proposed method can help the faulty network to recover in a short time and make the network status more stable.