Abstract: Finite difference method was used to simulate the temperature field of work piece during thin slab continuous rolling (TSCR). The model incorporated the effects of radiation, heat convection and heat conduction between rolls and work piece, as well as the heat due to deformation and friction of work piece is comparatively small. It was shown that the thermal effect of roll gang on the temperature field drop about 14-18°C. However, the temperature difference between the top and bottom of work piece is great in the process before finish rolling, up to 20-25°C. The predicted values from the model taking the effect of roll gang into consideration are close to the measured values.