本文从大理石宏观、微观物理力学性质分析入手，以损伤力学理论为基础，利用扫描电镜对大理石切断面进行了深入分析，提出大理石切割过程为：微裂纹成核和原生微裂纹产生应力集中；微裂纹扩展、贯穿、交汇；切屑去除三个过程。大理石切割机理为脆性破坏。 This paper starts with the analysis of the macroscopic and microscopic physical and mechanical properties of marble. Based on the theory of damage mechanics, the section of the marble is analyzed by scanning electron microscopy. The process of marble cutting is: microcrack nucleation and stress concentration of native microcracks; Crack propagation, penetration, intersection; three processes of chip removal. The marble cutting mechanism is brittle failure.