In the recent years, the operating voltages of most high-performance microprocessors were lower than that of the previous ones and the research of low-voltage/high-current DC-DC converter was enhanced. Among all topologies, the current-doublers topology is optional. In the current-doublers topology, the ripple current of the output filter capacitor is reduced because the ripple current of the two inductors partially cancel each other and the required value of the filter inductance is significantly decreased. To further decrease the ripple current of output filter capacitor, this paper introduce a new method that a few of current-doublers are interleaved. This paper gives the switch signal waveforms and simulation model of the circuit. PSpice is used, which is a simulation tool for electronic system. The result of simulation achieves the ideal effect. Finally, the design is tested by an experiment.