Abstract: Based on the finite element analysis software ANSYS,the 3-D finite element numerical model for analyzing the heat dissipation and holding of liquid in insulating tanker is established.Combining with the actual working condition,the influence of insulation layer thickness,heat insulating materials and vehicle speeds on the transient temperature field of liquid in tanker is discussed.The measure of automobile exhaust heating liquid in tanker is adopted,and the time history relationship of the liquid heated to unloading temperature since critical temperature is established by using finite element transient analysis technology.The comparison of heating efficiency is investigated at different geometries and distribution of heating pipes.