Abstract: In the technology of electromagnetic-tapping of ladle, the ladle isn't a fixed equipment and has a strong on-site mobility, so it's difficult to give the induction coil continuous cooling. A solution was proposed by making the nozzle pocket brick into inside-outside combination, and inserting the induction coil into the internal brick and adding high-temperature insulation materials inside and at the top of the coil, which reduces heat transfer to the coil and prevent overheat from losing the ability to work without water cooling. Under laboratory conditions, the temperature distribution of the nozzle pocket brick was tested, and was used for different material's insulation to make for experimental guidance. The results showed that after vermiculite insulation board 40 mm thick is added, when the temperature of the high temperature surface reaches to 1000°C and that of the low temperature surface reaches to 294°C, which is below the recrystallization temperature of copper, the coil is working in the operating temperature range.