Abstract: The oil throughput of Tieling-Dalian Oil Pipeline is continuously decreased in recent years, which is called the low throughput problem. The discussion around this problem is made. It is pointed out that the problems in insufficient heating ability, unstable operating pressure and high operational cost in this pipeline exist. The measures to solve these problems in heating transport with PPD and lowering the minimum inlet temperature for Daqing Oil are proposed. The influence of wax deposition to the pipeline operation is analyzed and the wax removal method and steps of the pipeline are given.