Domestic three-axis CNC machine tools have the problems of low accuracy and poor reliability, and the accuracy and reliability of the machine tools can be guaranteed by reasonable static accuracy design methods. The static precision design methods of machine tools include robust design methods of machining precision and static geometric precision design methods. Aiming at the problems of the coupling rationality of the two precision design methods and the low practicality of engineering applications, based on the indepth investigation of the static precision design research results of machine tools, from the key problems of the machine tool volumetric error modeling, the geometric error element identification of linear axis, and the key geometric error element traceability, robust design of machining accuracy and static geometric accuracy design, the specific solutions were given respectively, and a complete set of implementation schemes of static accuracy design system for three-axis CNC machine tools was formed to improve the geometric accuracy design of machine tools.It provides reference for static geometric accuracy design of the machine tool.