Abstract: Oil throughput in Anlang Oil Pipeline is lower than its minimum allowable design throughput, therefore, watered transportation process have to be put into operation. Through utilizing the existed old oil gathering pipelines optimally, technical reform is made on a 300 m³'s tank at An-A station and a technical program of intermittent oil transportation process is put forward to transport oil at a high outlet and discharge settling water at a low outlet of the tank. Reform result shows that this process can ensure long-term safe operation of the pipeline with a remarkable effectiveness in energy saving and consumption reducing.