Abstract: According to the general situation and basic parameters of Dongying-Linyi Parallel Oil Pipeline, the pump characteristic equa-tions of different combination in each pump station have been regressed, and the optimized mathematical model ot operation scheme has been founded.Except that, the calculation methods of oil flow temperature, overall heat transfer coefficient, crude oil density, specific heat capacity, viscosity-temperature relation as well as the determination basis of crude oil and power prices have been included in the optimized model.Using common HOPOPT software for steady-state hot oil pipeline, the pump operation scheme, inlet & outlet station pressure, inlet & outlet temperature, power and fuel consumption of each pump station have been calculated respectively for the Terminal Station at high, medium and low throughput and different inlet temperature.The optimum economical operation scheme is obtained based on optimized analysis and calculation, which reflects the relationship between the inlet temperature and energy saving potential for Dongying-Linyi Parallel Oil Pipeline.