It is very important to accurately forecast the change of soil temperature field around underground pipeline and inside pipeline oil temperature for drawing up scientific and reasonable crude oil transportation craft. To increase the accuracy of estimate, outside pipeline environment and inside pipeline oil temperature as well as various other factors should be taken into consideration during the calculating process. The temperature field of soil around underground pipeline in the process of cool and hot crude oil alternative transportation was numerically simulated by using finite elements method; the soil temperature distributions around pipeline and inside pipeline oil temperature at different time were obtained. Through analyzing the calculation results, it turns out that oil-line temperature, oil-line time and heat accumulation of soil influence inside pipeline oil temperature. When drawing up the craft of cool and hot crude oil alternative transportation, the influence should be considered.