Effects of FeO content (0, 5%, 10%, and 15% in mass, respectively) in labª²synthesized smelting reduction slag with iron bath and test temperature (1 450, 1 500, 1 550, and 1 600 ¡æ) on corrosion amount and microstructure of fused rebonded magnesia-chrome brick with 26.02 mass% of Cr2O3 were researched by rotary cylinder method. The results show that: (1) the corrosion amount of magnesia-chrome brick by slag without FeO is higher than that by the slag with 5% FeO, and the corrosion amount increases when FeO content increases from 5% to 15%; (2) the test temperature is one of the important factors affecting the slag corrosion resistance of magnesia-chrome brick, and the corrosion of smelting reduction slag to brick increases with the temperature rising.