To ensure connectivity of wireless sensor networks（ WSNs） and extend effective working time of networks

a new routing protocol with efficient and balanced energy based on event-driven clusters is proposed. The protocol cut energy consumption produced by nodes unrelated to the event participating cluster

and save network energy by delayed transmission of the controlled information of the cluster head election

establish relay routing rule with a comprehensive consideration of residual energy of the current nodes including average residual energy of neighbor nodes

and distance from current node to neighbor nodes and Sink nodes. Simulation results show that

compared with the pre-clustering AEEC and event-driven clustering ARPEES protocols

the proposed routing protocol prolongs the time of the first death node and thus increases effective working time of the WSNs by43 times and 47 % respectively.