Abstract: Based on the initial process design scheme of pump units in Kalamay-Urumchi Products Pipeline, when the actual annual throughput islower than 195×10⁴ t/a, the annual intermittent downtime is 158 d in total, which increases the restart-up/shut-down frequency of pipeline and the accident probability in equipment operation for the initial station, resulting in an energy loss caused by the throttle of regulation valve in the initial station. Based on the transportation condition in recent two years and from the point of power consumption, the paper analyzes and compares the differences in power consumption for the temporary testing pump unit and running pump unit. An optimum running scheme of pump units operated under different annual throughputs is proposed, that is, when the throughput is at 195×10⁴~300×10⁴ t/yr, fullload running with "2 oil feed pumps+2 main oil pumps (one half-lift pump and one full-lift pump)" for new pump unit is suitable; when the throughput is less than 195×10⁴ t and annual throughput is at 300×10⁴~400×10⁴ t/yr for temporary testing pump unit, full-load running with "3 oil feed pumps+2 multi-stage main oil pumps" for the new pump unit is suitable; when the throughput is over 400×10⁴ t/yr, full-load running for the new pump unit with "3 oil feed pumps+2 multi-stage main oil pumps+1 single-stage main oil pump" is suitable.