Abstract: This paper proposes a novel cascaded quasi-Z-source DC-DC boost converter which can be used in mine, and analyzes its circuit structure and operating principle, and deduces related voltage relation of the circuit. This circuit overcomes the shortcomings of the traditional Z-source converter such as low voltage gain, high voltage stress and discontinuous input current. The simulation results of the system based on MATLAB/Simulink are given. The experimental circuit based on TMS320F28335 is built, the theoretical analysis and experimental results are in complete agreement with each other, and the feasibility and correctness of the novel DC-DC converter are verified.