Multi-disks rotor systems are prone to complex nonlinear vibration issues caused by the nonlinearities of rolling bearing and misalignment faults during assembly or operation. This article presents a multi-disks rotor-bearing experimental platform, considering bearing Hertz contact, clearance, varying compliance (VC) vibration, and misalignment of couplings.By using the lumped mass method, a dynamic model of a 14-degree-of-freedom rotor-bearing-coupling misalignment system is established to analyze the vibration response and nonlinear resonance characteristics.Numerical and experimental studies have validated the effectiveness of the dynamic model.Due to the excitation of bearing VC and coupling misalignment, the system exhibited multiple resonance regions. These included the contact resonance caused by rolling bearing-induced VC before the first-order primary resonance, as well as 2-times subharmonic resonance caused by misalignment faults.The main response of the system exhibited nonlinear characteristics of high stiffness.