Innovative product design has become the core competitiveness of enterprises, and reverse engineering(RE) is an important tool to achieve innovative design.Two redesign methods in RE based on combination of forward and reverse softwares and hybrid modeling were researched .And based on the redesign model ,simulation and optimization as well as rapid prototyping were combined ,and the RE engineering processes for innovative design was proposed. and case study was given, which provides a new way for product innovation design .