Abstract: Lightweight composite fan case is of a great significance to the weight reduction design of a large civil turbofan engine. To investigate the containment process and mechanism of a Kevlar wrapped reinforced case structure, containment tests were conducted on a high speed spin tester, using a high speed rotating plate blade to impact the aluminum alloy ring wrapped with Kevlar49 fabric. Numerical simulation was carried out using explicit transient dynamic code LS-DYNA. The results show that the containment process of the case can be divided into three stages, which involve two main impacts. The majority of the blade kinetic energy is absorbed by the Kevlar woven fabric. There is a large bulge deformation on Kevlar fabric in the containment process. The size and location of the bulge change with the movement of released blade.