Abstract: Due to the difficulties that the dissipation of energy and the poor effect of intrusion tolerance of topology in the practical application of wireless sensor networks, the distance between nodes and the residual energy of nodes are considered when constructs the network topology, to make the residual energy of nodes connected probability is higher.By the methods of random walk strategy combined with the improved scale-free network "growth" and "preferential attachment", the random-walk scale-free topology model (RSTM) is proposed commensurately.The simulation results show that, the proposed topology not only has the power-law characteristic of scale-free network, but also posses a good stability and fault tolerance respectively.