Abstract: A heat conduction mathematical mode of soil is set up according to the assumption of ambient temperature periodic variation and semi-infinite soil and Phoenics 3.6 software is used to obtain the effect of different temperatures on soil's heat conduction area. Soil's heat response characteristic at different depth is explored with different frequency, thermal wave in different amplitudes, and different material parameters. The research method can be applied for study on unsteady state temperature field of cold-hot oil batching transportation.