Abstract:With considering the oil film bearing in rolling mill as the research object, the various factors that cause the failure were comprehensively analysed, and the oil film bearing in rolling mill failure of fault tree was established. Through quantitative analysis of the fault tree, the oil film bearing of each stage of minimal cut sets was solved, and sleeve damage, liner damage, lubricating oil deterioration as the main failure form of oil film bearing in rolling mill was determined. The relevant measures of preventing oil film bearing in rolling mill failures and improving its reliability are proposed.