In order to solve the hot spot problem of multi-hop network, a redundancy deployment strategy based on energy balance is proposed to improve network performance in wireless sensor networks. In this paper, the clustering topology based on grid is adopted in network layer, and an energy balance model based on redundant nodes rotation dormancy is proposed to deploy more redundant nodes for grids which are closer to base station. By adopting this method, the energy consumption of network can be balanced and the hot spot problem can be improved. The simulation results show that the redundancy deployment strategy proposed in this paper is able to balance the energy consumption of network, improve the hot spot problem of multi-hop network effectively, and extend the network's lifetime.