Abstract: Crude oil is difficult to unload during transport in cold region in winter. The paper introduces a heat pipe type heating device for road tanker. The heating process is taking the tail gas of the vehicle as a heat source and adopting the heat transfer elements to heat the oil indirectly during travelling. By analyzing the heat transfer of the tanker with a internal heating source, a mathematic model is established and the calculating equations of the oil changing with time have been obtained. The comparative analysis on the actual values and computative values show that the heating device can effectively prevent the oil from solidity, which not only saves the energy, but also increases the oil delivery effeciency.