The technology of indoor global localization is the core component of automatic vehicle and robot,and it is also a research focus.Based on this background,this paper studied a fast algorithm of global localization algorithm based on lidar.The eigenvector of the global map and the local map are compared and matched to achieve the precise positioning of the lidar.The effectiveness and positioning accuracy of the algorithm were analyzed using simulation experiments,which shows that the average ratio of position error was 0.791 % and the average orientation error was 0.3883 °.The results indicate that the algorithm can stably and accurately acquire the pose information of static lidar,and it is an effective method to study the indoor global positioning.