Abstract: Aiming at the defects and their causes of energy multipath routing algorithm in wireless sensor networks，the author proposed an energy multipath routing algorithm based on dynamic priority. The routing algorithm determined the priority of one node by replacing the path energy consumption cost with the hop count value between the node and the sink node，and constantly adjusted the priority of nodes in the data transmission process according to energy consumption of nodes，thus it reduced the complexity of the algorithm，and avoided time and energy loss brought by periodic routing maintenance. The simulation results showed that the algorithm could effectively reduce and balance the energy consumption of each node，and prolonged the lifetime of the whole network.

Key words: wireless sensor networks, routing algorithm, energy multipath, dynamic priority, hop count of path