Abstract: In order to reduce energy consumption in oil transportation, non-heating operation's theoretical analysis has been carried out in Arsai Pipeline, based on actual coefficients, calculation proof has been made stressing on the aspects of thermal and hydraulic, which provide enough theoretical basis for non-heating operation. Thermal calculation made is mainly to assess whether the inlet oil temperature at each station after non-heating operation is higher than crude oil's pour point; and hydraulic calculation is made to assess whether the pump pressure after non-heating operation is able to overcome the frictional resistance between stations. Through on-site practice in Arsai Pipeline, high efficiency, low consumption and stable oil transportation have been realized.