Energy load imbalance problem in wireless sensor networks（ WSNs） affects network lifetime. A double cluster-heads clustering routing protocol（ DCHP） based on polymerization degree model is presented

and DCHP protocol introduces node polymerization degree and remaining energy as consideration factors into threshold value calculation

so that elect the first cluster-head prior from high residual energy and high degree of polymerization of node. On this basis

according to energy of in cluster nodes to choose the second cluster-heads

complete data transmission with multiple hops routing in variety clusters. Simulation results show that DCHP protocol can better balance energy load in network and prolong network lifetime.