The　batch　transportation　process　of　several　kinds　of　crude　oil　is　accomplished　by　an　entire　coupled　pipeline　system,　which　exhibits　complex　thermo-hydraulic　characteristics.　Based　on　the　coupled　characteristics　among　soil,　pipelines　and　devices　(including　pumps,　heating　furnaces　and　valves),　a　coupled　simulation　model　of　batch　transportation　for　the　crude　oil　pipeline　system　is　established,　and　a　novel　coupled　simulation　algorithm　is　proposed.　The　simulation　results　are　in　good　agreement　with　the　field　data　of　an　actual　crude　oil　pipeline　system.　In　addition,　based　on　the　numerical　simulation,　thermo-hydraulic　characteristics　of　pipeline　system　are　investigated,　and　some　new　thermo-hydraulic　characteristics　are　obtained.　In　the　batch　transportation　process　with　constant　flowrate,　the　change　trends　of　temperature　at　the　outlet　of　each　pipeline　segment　are　hysteretic　and　the　change　ranges　of　temperature　become　small　along　mileage.　And　the　adjustment　of　devices　influences　thermo-hydraulic　characteristics　to　some　extent.　In　the　batch　transportation　process　with　variable　flowrate,　the　complex　thermo-hydraulic　characteristics　are　exhibited,　which　are　induced　by　the　comprehensive　influence　of　the　changes　of　oil　type,　flowrate　and　absorbed/released　heat.　Compared　with　the　transportation　process　with　constant　flowrate,　the　high-viscosity　oil　exhibits　similar　minimum　temperature　and　lower　maximum　pressure　in　the　transportation　process　with　variable　flowrate,　which　means　that　the　higher　transportation　safety　of　pipeline　system　is　obtained.　This　study　can　provide　a　scientific　reference　for　making　the　safer　batch　transportation　scheme　of　crude　oil　pipeline　system.　©　2023,　Science　Press,　Institute　of　Engineering　Thermophysics,　CAS　and　Springer-Verlag　GmbH　Germany,　part　of　Springer　Nature.