Abstract: Node parameters of pipeline networks, flowrate of compressor stations, suction and exhaust pressures as optimized variables, optimized running mathematical model based on a minimum sum of energy consumption in compressor stations for pipeline networks is established.Because the optimized model is characterized by nonlinearity in objective function and constraint condition。nonconvexity in region of solution and noncontinuity in optimized variables, a new evolutionary algorithm to solve the model is constituted based on genetic algorithm's search mechanism and chaotic-search algorithm's ergodicity.Taking the pipeline network in Sugeli Gasfield as an example, optimal node operating parameters of pipeline networks and that of compressor stations including running number of compressors are obtained through the new evolutionary algorithm, and besides fulfilling gas transmission tasks, this model is helpful to decrease energy consumption in compressor stations.