Valve train has important impact on engine’s performance and useful life. With the development of engine technology, the failure about valve train get attention gradually. Valve spring of engine is the important components in the valve assembly. In order to ensure valve and cam work reliably in poor condition, the dynamic failure analysis on them have great theoretical and engineering applied significance. So the dynamic performance and reliability of the valve train should also be concerned. The new software is a high-performance language for technical computing. It integrates computation, visualization, and programming in an easy-to-use environment where problems and solutions are expressed in familiar mathematical notation.