To improve the key performance of a basic cascaded Boost converter including its voltage gain, a magnetic integrated switch capacitor high-gain cascaded Boost converter is proposed. Two voltage doubling units in the switch capacitor are split and further recombined with the pre-stage energy storage structure in the cascaded converter, where the magnetic integration technology is applied simultaneously. As a result, high voltage gain is realized while reducing the voltage stress and inductance current ripple in the switch. The working modes of the converter are analyzed, the performance parameters are derived and the magnetic integrated design scheme is given. Finally, the theoretical analysis was verified by simulations and the production of a prototype.