Comprehensively considering the factors such as descaling cooling,air cooling,water cooling,frictional heat and deformation heat in gap of every stand,heat conduction between work roll and strip etc,a model of two-dimensional transient temperature field of finish rolling section in hot tandem rolling was built with finite difference method to calculate the temperature fields of strip and work roll.So two-dimensional accurate analysis and calculation of strip temperature were realized,and the theoretical basis for predicting and controlling strip temperature was provided.The simulated results show that the model is practical and reliable. Comprehensively considering the factors such as descaling cooling, air cooling, water cooling, frictional heat and deformation heat in gap of every stand, heat conduction between work roll and strip etc, a model of two-dimensional transient temperature field of finish rolling section in hot tandem rolling was built with finite difference method to calculate the temperature fields of strip and work roll.So two-dimensional accurate analysis and calculation of strip temperature were realized, and the theoretical basis for predicting and controlling strip temperature was provided. the simulated results show that the model is practical and reliable.