Abstract: In order to constantly optimize the operation schedule for Ma - Hui - Ning pipeline, the field test is carried out based on the laboratory test, the original schedule of "two, four, six" transportation (it means two months in summer by cold transportation, four months in winter by integrated treatment, six months in spring and autumn by heat treatment transportation) turned to "three, three, six" schedule (it means three months in summer by cold transportation, six months in winter by integrated treatment, and six months in spring and autumn by heat treament). The new schedule has met the production and also saved energy.