Oil film bearing, which works on thin film between sleeve and bush, is widely used in steel industry due to the characteristics of high efficiency and low noise, etc. The backup roll of 1 580PC hot strip mill invested by some steel corporation has been equipped with such bearing. During the process of setup&disassembly and usage period, the sleeve has been dramatically damaged, which results in production accidents and decreases its service life, thus heavily influencing steel production. Aimed at such puzzles, under specific loadcase, mechanical properties of bearing sleeve, as well as estimation of contact status and adhesive force of sleeve by interference fit, are quantitatively simulated by finite element method, which establishes an mechanical foundation for improving the load capacity of bearing and decreasing its wear and adhesion damages. Finally, some measures and conclusions are drawn.