A CAD/CAM idea with its relation model including the analyses of braid process, yarns internal geometry and mechanical properties is proposed. An infrastructure of CAD/CAM system with platform and criterions which endure expandability is introduced. Based on the platform, some subsystems are built to accomplish various tasks such as 3D modeling, finite element analysis and braided process simulation. In order to implement the platform, parameter transferring is analyzed and an example is given. Based on the braiding process of composite, the axis direction stiffness/flexibility matrix, cell stiffness and engineering constants is acquired by the analysis of yarns and cell. At last, a proper and feasible collaborative environment and the tasks assignment is proposed. Based on the platform, an analysis instance is finished and the results are exhibited.