In order to solve the problem of online detection between the processes of the bearing intelligent production line, the automatic detection device for the bearing inner ring groove pendulum between processes was studied; the various factors that affected the detection precision of the bearing groove pendulum were analyzed, mechanical analysis was performed; based on virtual prototype technology and ADAMS multibody dynamics simulation software, the bearing runout was measured.Experimental verification based on the set simulation parameters shows that the experimental results are almost same as those of mechanical analysis, which proves the rationality of the designed testing device and the correctness of the mechanical analysis, and provides reference for the design of the groove pendulum detection device in the intelligent production line of bearing inner ring.