In this paper

we present a topology fault tolerant strategy for wireless multi-hop networks that based on fault diagnosis and recovery technology.We utilize the comparison model to diagnose faults and have a deep research on recovery method which is irrelevant to routing algorithm.Then

the network can possess the function of fault tolerant.And we analyze the communication complexity（3n+t·dmax +t-2） and time complexity（（dST+1）Tgen+（2dST+2）Tf+Tout） of the proposed strategy.Through the simulation results

we can conclude that the proposed method can reduce the communication traffic and the time latency as well as the energy consumption of the network system.