从微型机械的实际应用出发 ,对比传统机械的设计方法 ,应用有限元理论及其相关分析软件 ,对微型齿轮的齿根弯曲应力进行计算及分析 ,并对分析结果进行图像处理 ,可视化地观察齿轮有限元分析单元的应力状况、位移变化 ,从而方便且清晰地寻找最大应力单元、判断微型齿轮受载状况。通过多次计算得出大高宽比微型齿轮所能承受的载荷范围 ,为微型齿轮的设计和实际应用提供了参考依据 Based on the practical application of micromachining, compared with the traditional mechanical design method, the finite element theory and its related analysis software are used to calculate and analyze the tooth root bending stress of the micro-gear. The results of the analysis are processed by image and visual observation of the gear Finite element analysis of stress conditions, displacement changes, so easy and clear to find the maximum stress unit, to determine the micro-gear load conditions. The calculation of the load range of the micro-gear with high aspect ratio by multiple calculations provides a reference for the design and practical application of the micro-gear