Abstract: A series of tests were used to study the temperature fields and heating efficiency in the model tundish to simulate the real situation in continuous casting tundish with induction heater for the Chong Qing Special Steel Plant and Cheng Du Seamless Tubing Plant.A personal computer was used in data acquisition and calculation.Based on data processing,the results were compared with that of electric slag heater.It is shown that both heating methods could prevent the tundish from temperature drop,but temperature distribution is not same.The thermal efficiency of simulated induction heater is about 80%.By the analysis of dimensionless method,the temperature distribution of molten steel in the real tundish can be deducted.