Abstract: High step-up voltage gain DC/DC converters are widely used in green energy power generation, uninterruptible power system and other industrial applications. This paper discusses the characteristics of the switched-inductor/switched capacitor cells, making some comparisons between the active-network converter and the traditional Boost converter. On the basis of the above analysis, this paper derives a multicell switched-inductor/switched-capacitor active-network converter, the proposed converter combines the advantages of switched-inductor/switched-capacitor cell and active-network structure, compared with previous high step-up voltage gain converters, the novel converter provides a higher voltage conversion ratio with a lower voltage/current stress on the power devices. Theoretical analysis and experimental results were presented to demonstrate the feature of the proposed converter.