Iron-based soft magnetic composites (IBSMCs) exhibit high permeability, high magnetic induction, low iron loss, and a low magnetostriction coefficient. Investigating the vibration characteristics of reactors with IBSMC cores is of significant importance. Utilizing a finite element simulation model, this study calculates and analyzes the vibration distribution of IBSMC core reactors and silicon steel core reactors under normal operating conditions through the coupling of electromagnetic-force multiple physical fields. The results indicate that the vibration of IBSMC core reactors is notably weaker than that of silicon steel core reactors. Specifically, the maximum vibration displacement is 50.8% of that of silicon steel core reactors, and the maximum vibration acceleration is 71.2% of that of silicon steel core reactors.