The laminated busbar is a very critical component of the accelerator power supply equipment. A large number of large-capacity capacitors, high-power switching tubes and other important components are connected in parallel to it. It works in medium to high frequency and high current pulse mode. The performance of the laminated busbar—especially whether the distribution of inductance and resistance is uniform enough—has a direct impact on the reliable and stable operation of the power supply. In actual engineering practice, it is difficult to evaluate and judge the performance of laminated busbars simply and intuitively. It usually needs to be determined through actual testing after the power supply is manufactured. At this time, if it cannot meet the standards, it will have to be reworked. The process of optimizing the design is therefore time-consuming and laborious. This paper tests the use of finite element analysis method to analyze the inductance and resistance of laminated busbars with a specific structure. To achieve this goal, the script function of the existing commonly used commercial software ANSYS was re-developed to complete the script generator, which in disguise realized the multi-parameter batch scanning analysis and calculation functions required for research. On this basis, the inductor and resistance of a laminated busbar used in actual power supplies were analyzed and calculated, and a design method was proposed to make the distribution of the inductor and resistance more uniform by drilling holes in the laminated busbar metal plate, with good results. It also shows that it is feasible to introduce finite element analysis method into power supply design to analyze the performance of some special components, thereby improving the efficiency of design work.