Abstract: A hybrid PFM-PWM control strategy based on dynamic surface control is proposed to address the stability, fastness and tracking of the CLLC converter high order system for power transfer under full load condition. This control method can use PWM control and with PFM control strategy in light load and full load state respectively, based on this hybrid control strategy CLLC resonant converter can switch modes according to the output voltage value. This paper analyzes the topology of the CLLC resonant converter in detail, analyzes the operating waveforms of the under-resonant state, the resonant point state and the over-resonant state, and comes up with a specific implementation scheme of the hybrid control strategy for the dynamic surface. Combined with the characteristics of the mining locomotive charger to the use of MATLAB/Simulink simulation and physical experiments to prove the feasibility of the proposed control method.