Abstract: This study addressed the issues of slag erosion around the ladle rim and cracking in the permanent lining of steel ladles. By adopting a dual-ring masonry process for the permanent lining, the refractory structure of the ladle rim and the permanent layer was optimized, effectively resolving problems related to erosion by slag-bonding material at the ladle mouth and cracks in the permanent lining.Through the optimization of the permanent lining structure, working layer thickness, and the refractory configuration of the ladle mouth, both the safety and the effective volume of the steel ladle were improved. The results showed that using high-performance slag-resistant magnesia-carbon bricks effectively mitigated erosion at the ladle mouth and increased the average holding capacity of the ladle. Additionally, the application of inner-ring bricks and the synchronous masonry of permanent lining castables significantly enhanced the overall safety performance of the ladle while meeting operational requirements.