Castables were prepared with high-quality bauxite,fused white corundum,tabular corundum,magnesium aluminate spinel,fused magnesia and alumina micro powder as main raw materials,and pure CAC, ρ-Al2O3 micro powder and magnesium gel as binders respectively.Effects of binder types,grain grading and addition amount of burst resistance agent on strength of ladle bottom after demolding,burst resistance performance and apparent porosity were compared.The results showed that the magnesium gel was the best binder for burst resistance,while silica micro powder was the secondary.Appropriate increase the amount grain and burst resistance agent was better for improving the burst resistance performance.