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Grinding machine tool structural design should meet the standards of high rigidity, high stability and low vibration. Thus, it is necessary to solve the machine structural problem. This paper used the CAE software ABAQUS to conduct the finite element analysis of the grinding machine tool, structural rigidity and modal properties with modal experiments as the auxiliary of modal property analysis. Then, the structural optimization design software TOSCA was employed in the grinder structural topology optimization design. Finally, the results before and after optimization were analyzed and evaluated. The weight of the structure fell from 5.14 ton to 4.63 ton, reducing by 9.92%; the stress fell from 0.759Mpa to 0.237Mpa, reducing by 68.77%; the displacement fell from 1.3μm to 0.936μm, reducing by 28%; rigidity increased from 153.85 MNm-1 to 213.68 MNm-1 by 39%; the modal frequency increased by 16~34%. The comparison results suggested that the proposed method can reduce the weight of the grinder structure and stress. The results can serve as a reference in the research of natural frequency.
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