Abstract: The wear of the cutters accounts for a significant portion of the engineering costs when a Tunnel Boring Machine (TBM) operating in hard rocks. Understanding the wear patterns of the cutter is a key factor in optimizing cutter design and reducing cutter consumption. Based on a TBM project in Xinjiang, this study found that the wear of the cutter edge tip is quite common under Class Ⅱ and Ⅲ rock conditions. By continuously tracking and measuring the shapes of the worn cutter edge, the changes in cutter edge shape during the wear process was analyzed from various perspectives, including tip position, edge height difference, tip height, and edge width. The results indicate a consistent trend in the evolution of the face cutter's edge shape, with the tip leaning inward and the edge being higher on the inside and lower on the outside. In contrast, the edge cutter's shape evolution exhibited two forms: one with the tip leaning inward and another with the tip leaning outward. By analysis of the stress state during the rock-breaking process of the cutter it evaluated the impact of installation radius and tilt angle on the wear shape of cutter edges. By statistically analyzing the wear volume and diameter loss of the cutter, it was found that as the installation radius increased, the wear rate of the center cutter rapidly decreased, the wear rate of the face cutter tended to stabilize,while the wear rate of the edge cutter sharply increased.