Under high-speed and heavy-load conditions, the vibrations of the CRBs (Cylindrical Roller Bearings) in the MRPGSs (Multi-Row Planetary Gear Systems) intensify due to revolution-rotation coupled motion. Thus, it is helpful to investigate the vibration characteristics of CRBs in MRPGSs under high-speed and heavy-load conditions which can provide guidance for the low-vibration configurations of CRBs in MRPGSs. In this paper, the dynamic modeling method of the MRPGS is proposed based on the Simpack platform. The MRPGS model under different operating conditions is simulated and the relationships between the CRB vibrations, the operating speed, and the load torque are revealed. The speed row CRBs exhibit more severe vibrations compared to those in the coupling row. The dynamic behaviors of the coupling row CRBs are influenced by the combined effects of input speed and load torque, while the speed row CRBs vibration intensify progressively with the increasing speed.