The multiple rip saw will result in vibration, noise and deformation by force during the operation. As a result, cause wood quality instability, material wear and tear. The Computer-Aided Engineering approach was implemented in the design process. It will sample test transformation numerical analysis. Progressively look for appropriate Improve the design. This study used finite element analysis software to conduct structural strength analysis and modal analysis of the multiple rip saw. And the results can serve as the basis for design improvement. According to structure insufficient place conduct improve. Receive optimal achieve improved design. However, the rigidity is usually proportional to the weight of structure; the more rigid structure, the higher cost of materials. The target of study is to design the lightest main structure with enough rigidity. Key words: Multiple rip saw, Finite element analysis, Structural strength, and Model analysis