Abstract: Automatic fiber placement CAD/CAM software is the key technology to realize the automatic composite materials manufacturing. According to the characteristic of equipment and the process of auto fiber placement, visualization system of fiber placement is developed using the OpenGL in VC6.0 platform. The system can be used to realize the core mold import and reconstruction, the establishment of the topological relationship between vertices, lines, and trianglesis in the system, which can provide data support for the follow-up visual display. Through the study of the kinematics analysis of the laying process to determine the trajectory of point coordinates, the fiber was then drawn. The surface of the core is laid with using the fixed angle algorithm through the visualization system, which can verify the validity and effectiveness of the visual system.