AZS material is a key building material in the furnace of glass industry, the microstructure of material and the stability of zirconia phase have significant effects on the corrosion resistance to the molten soda-lime glass. The physical and chemical properties of fused-cast 41#AZS materials with a small addition of yttrium oxide were studied by means of chemical analysis, high temperature X-ray diffraction, glass corrosion resistance test and electron microscope. The results show that the microstructure of material is improved by adding a small amount of Y2O3 stabilizer, Y2O3 is mainly deposited in the ZrO2 crystals and dendrites, which firstly crystallize, resulting in the refinement of the particles of these crystalline phases. The temperature range of ZrO2 phase transition becomes smaller, the degree of transformation reduces, and the stability of ZrO2 crystal and eutectic improves, thus the corrosion resistance of material to glass melt is significantly improved.