To achieve satisfied automobile development that integrates various functionalities such as crashworthiness，passengers’comfort，structure reliability and cost control etc.，it is necessary to fully utilize computer aided engineering（CAE）analytical technologies with crossdisciplinary and multi-purpose approach，while taking account of comprehensive performance objectives and automobile development efficiency during the entire process of automobile new product development. Based on research and development process of Geely automobile，the parametric flex technology and multisystem optimization method are introduced to perform prediction and optimization in automobile crash，noise vibration harshness（NVH）and structure strength etc. so as to ensure automobile overall performance and design efficiency，and realize high-efficient development of Geely self-owned brand models eventually.