Incomplete assembly could affect product quality and performance, and even cause inestimable losses. In the industrial environment, the lack of image datasets and the inability to obtain the physical assembly in advance is a challenge for machine vision to detect assembly integrity. We propose a 3D CAD model-based method to detect assembly integrity without physical assembly. 3D CAD models are utilized for 2D image rendering and dataset construction, and automatic labeling can be achieved through edge extraction a…