Abstract: In order to reduce the current ripple of the inductor in the converter, the influence of coupled magnetic integration on the current ripple is studied. From the perspective of coupled inductor mathematical model, a general integrated model of two-phase coupled inductor is established. According to the mathematical model, the influencing factors of current ripple and the limiting conditions of each parameter are analyzed. Under the conditions of constant voltage ratio of two inductors and constant time ratio of inductor voltage, the variation of inductor current ripple with different duty cycle, phase angle and coupling coefficient is systematically analyzed. The calculation method and design criteria of inductor current ripple under different conditions are given. By setting specific simulation parameters and comparing the theoretical analysis results, the correctness of the principle analysis is verified. Finally, two interleaved boost converters are taken as examples to verify the correctness of ripple analysis.