Abstract: The magnetic coupling resonant wireless power transfer system operates through resonant magnetic field coupling, enabling non-contact power transfer. By establishing the equivalent circuit model of the SS-compensated MCR-WPT system, the study reveals the quantitative mapping between output characteristics and resonance parameters through theoretical modeling. Numerical simulations systematically demonstrate that ESR variations dynamically degrade output current and efficiency, inducing instability under load transients. To address this limitation, a phase-shift-based dynamic regulation method is proposed, with a feedforward-compensated closed-loop control architecture. This approach achieves seamless CC/CV output mode switching within the SS topology.