Abstract: This paper studies the key technologies of digital assembly hole-making process plan, such as mathematical model analysis, hole-making operation planning, and operation simulation.proposing a hole-making process design model for digitial assesmbly.Based on CATIA, a corresponding software platform is developed to solve the problem of low analysis efficiency, poor standardization, and inconsistent data sources for different offline programming systems; through optimization of the pore simulation process, the combination of static simulation and dynamic simulation, theoretical simulation and measured simulation, solved the low simulation efficiency and guidance weakness and other issues have greatly improved the efficiency and quality of digital assembly hole-making process plan.