Abstract: The quantification of PDC bit cutting parameters using simulation method is an important technique for drill bit customization.To improve the efficiency and accuracy of PDC bit drilling simulation and realize a seamless connection with 3D design system of drill bit,UG/OPEN was imported in the study.Based on PDC bit cutting parameters theory and original computing method of cutting volume,the Boolean operation of UG software was used for redevelopment.Meanwhile,the principle of UG/OPEN quick access to the cutting volume was utilized to build the bottomhole PDC bit model,In this way,the cutting process was simulated equivalent to the geometric Boolean subtraction,and numerical computation was made to obtain cutting volume,contact area,cutting force and other parameters.The study showed that the simulation of cutting parameters revealed the same tendency as the existing numerical simulation,and has higher accuracy and simulation efficiency.Therefore,the new method of cutting parameters simulation based on UG/OPEN provided a technical foundation for rapid customization of PDC bit.