Through measurement and numerical model calculation,the change of molten iron temper-ature before and after reconstruct of inner lining was studied.The results show that without changing the thickness of inner lining,the optimization of lining structure has obvious influence on the molten i-ron temperature.The measured results show that under the condition of less molten iron,low molten i-ron temperature and long running time,the measured final molten iron temperature is increased by 17℃ and the surface temperature of torpedo car shell is decreased by 55℃ after reconstruct.The numer-ical calculation results show that under the condition that the amount of iron,the molten iron tempera-ture and the running time are the same as those measured before reconstruct.,the final molten iron temperature is increased by 24℃ and the surface temperature of torpedo car shell is decreased by 54℃ after reconstruct.It shows that the reconstruction scheme of inner lining is remarkable effect.