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In order to solve the uneven energy consumption and the premature death of the nodes for the wireless sensor network, a new routing algorithm based on the improve ant colony optimization is proposed. The network structure is added to the network separation band and the search angle, and combined with the remaining energy of the nodes, to jointly limit the transition probability of the next node; at the same time, the heuristic function is improved, the energy influence factor is added, the algorithm optimization is enhanced, and the local optimum is avoided; in the aspect of pheromone update, the threshold mechanism is introduced, and the optimal path weight value is set to find an optimal path. According to the simulation results, the improved algorithm can further reduce network energy consumption and prolong network life cycle.