Abstract: Conventional DC/DC converter for fuel cell power generation system is mainly isolated Boost converter,however,the converter has limitations in efficiency,step-up ratio and input current ripple.Therefore,a novel isolated Boost converter with double inductor and resonant doubler of output voltage was proposed.Double inductor structure was used in the input side ,and resonant doubler of output voltage was used in the output side for the purpose of realizing zero current switching of rectifying diode.Compared with the conventional isolated Boost converter,input current ripple of the proposed converter was decreased,while the converter gain was doubled.The operational waveforms was presented and modality analysis was done.Furthermore,the gain characteristics and the input current ripple of the converter was analyzed,and a practical design method was proposed.Finally,a 500 W prototype was build,and the full load efficiency was 96.5%.The experimental results verifies the feasibility and advantage in high efficiency power conversion of the proposed converter.