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In order to meet the demand of high-gain direct-current boost converter in the process of using new energy, a novel quadratic boost direct-current converter is proposed. In this paper, the quadratic boost direct-current converter compared to the traditional quadratic boost direct-current converter and boost circuit, have a higher voltage gain and lower switching tube voltage stress, which is more practical for high energy conversion efficiency , The voltage gain requirements of the new energy and network applications. The correctness of the theoretical analysis is proved by the experimental model of the laboratory.