This paper mainly CA1091 fork shaft flange machining process and the fixture has been designed on the CAD drawing knowledge and virtues of the order. Understanding of the current Model CA1091 fork shaft flange manufacturing techniques and trends. Fork shaft flange on working conditions, structure, technical requirements understanding, drive shaft flange of the CA1091 compiled binary for processing. This knowledge of fixture design was integrated, and made in the fixture design should pay attention to the problems and principles to be observed. In the current situation of domestic fixture design based on the analysis, extensive use of jigs for small and medium enterprises often happen, we need to fixture design, fixture design with modern tools of knowledge, it can effectively improve the fixture design speed and quality, thereby enhancing business efficiency. In addition, we follow the development trend of modern mechanical design using CAD draw product key process components and fixture plan. Meanwhile, the design also developed a comprehensive application of the knowledge I have, the independent ability to complete product design, and analyze and solve problems.