Electromagnetic continuous casting(EMC) is a novel continuous casting technique which utilizes electromagnetic force to maintain the melt free surface in a desired shape. In this study the effect of electromagnetic field on the free surface shape of tin melt was investigated. Tin was used because it has the similar density and electroconductivity to steel. High frequency(2.5㎑) coil current was calculated with the measurement of the electromotive force in a solenoid probe. The effect of the electromagnetic field on the melt shape was numerically analysed. The predicted results were compared with experimental results under the variation of melt mass and coil current. The influence of the cross section shape and inner diameter of the coil was studied. It has been shown that the coil which has a tapered inner wall was more suitable for EMC than the coil with a rectangular cross section. The tapered inner wall plays a role of screen without power dissipation. The predicted free surface was in a good agreement with experimental results.