The invention discloses a DCM control method of a wind power generation current transformer BOOST circuit. By use of a digital control technology, operation control is carried out in a microprocessor or a digital signal processor chip through software. The invention describes the mechanism of the DCM of a boost chopper boost circuit under the digital control technology, brings forward a realization method of accurately describing digital discretization control under the DCM, and points out a determining method of the DCM and a CCM (continuous conduction mode). Of course, the method provided by the invention is also applied to the CCM. According to a boost control model in the embodiment of the invention, no stable state errors are generated, and reference current can be accurately tracked.