Abstract: By using traditional opportunistic flooding (OF) algorithm, the "bottleneck" nodes are burdened with heavy relay traffic via multi-hop communication and tend to die earlier and that leads to the network being partitioned in low-duty-cycle wireless sensor networks.Based on the defect of OF algorithm, the new algorithm fully considers the link quality and node's remaining energy when selects the node to be the sender.It maintains the energy balance of the nodes and solves the problem of rapid death of "bottleneck" node due to large load.The simulation results shows new algorithm ensures a low end-to-end latency and high delivery rate, effectively extends the network lifetime and enhances the network reliability.