Aiming at the fatal issues of low efficiency, serious fever and low reliability of hard-switching topologies employed in the traditional power supply for maglev controller, a novel high efficiency soft-switching power supply was developed by employing LLC resonant converter topology. The LLC resonant converter had some desirable features such as zero-voltage-switching (ZVS) of primary and secondary side MosFETs and zero-current-switching (ZCS) of secondary diodes over the entire operating range, thus the conversion efficiency of power supply could be increased significantly. The experimental results show that the 92% peak efficiency can be achieved under 330V nominal input voltage.