Abstract: With the finite element analysis system ANSYS, the temperature field in blast furnace wall, cooled with flanged stave system, was numerically simulated. The influence of the refractory kind and its wear extend was' investigated, and the principal reason and process of wear of the blast furnace lower shaft wall was discussed. Analytical results show that the insufficient cooling capability of the stave flanged part results in the maximum temperature on the lining hot face is always higher than its chemical erosion critical temperature, and no equilibrium thickness lining could be kept steadily on the front of flanged part of the stave.