The dynamic forecasting model of temperature field in slab was established by the numerical solution according to the energy conservation.The ANSYS simulation was successfully introduced to the modeling simulation of slab heating based on the character of slab heating.The simulation results emerge the temperature field and heat transfer of slab heating,and offer investigative instrument for the more analyse of slab heating and heating system.The temperature field in slab and energy saving are achieved by using the model database of slab heating.