In order to predict the change of temperature field of pavement structure, this paper determined the temperature parameter by the theoretical formula and then verified its accuracy through finite element analysis.During the research, this paper summarizes meteorological parameters in the project area and determines material parameters and meteorological parameters for the finite element calculation models after analyzing the temperature data.And then, modeling and calculating the temperature field distribution in the test section of Jilai expressway.Finally,temper- ature observation data and calculation results are compared to adjust the calculation model to make the settlement result close to the measured value.The research results show that the surface layer can be only considered and the probability of cracking is very small when studying the shrinkage and cracking caused by the sudden drop of temperature.The shrinkage and cracking of the base can refer to the variation rule of the temperature difference within one year.

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