本文从摩擦学角度，以粘着理论为依据，用数理统计方法，对零件加工表面结构的独立单体－微凸体的峰谷曲率半径的大小；沿高度支承面积的变化，以及接触变形过程中塑性指数的力学性质等进行了深入的分析，揭示了零件加工表面与技术性能、使用寿命、工作可靠性及成本有看密切的关系．从而，为合理选择微观形状精度－表面粗糙度的设计与制造方法，提供了理论依据． Based on the theory of adhesion and the theory of adhesion, mathematical statistics are used to calculate the radius of curvature of peak-valley curvature of independent monomer-asperity of the part-machined surface structure, the variation along the height of the bearing area and the contact deformation process Plasticity index of the mechanical properties of an in-depth analysis revealed that the surface of parts and technical performance, service life, work reliability and cost are closely related. Therefore, it provides a theoretical basis for the reasonable selection of the micro-shape precision - the design and manufacture method of the surface roughness.