The useful life and processing precision of machine tools strongly depend on the occurrence of mechanical vibration. Recently, due to the development of computer technology, the use of computer aided software, e.g., finite element analysis, to analyze the dynamic responses of multi-body structures is easier than before. However, the accuracy of numerical results is determined by the correctness of the structure of the finite element model. Therefore, the objective of this study is to employ a grinding machine as an example and use the techniques of modal measurement to verify the correctness of the finite element model, and thereafter accurate dynamic characteristics of structure can be obtained and are able to provide useful parameter space for future design.