The invention discloses a DPWM circuit with a double-edge trigger hybrid structure and a control method thereof. The DPWM circuit comprises a Gray code state transition module, a clock management module, a path balance and phase shift module, a fine duty ratio signal decoding module, a high-speed carry logic module and an asynchronous clear output module. The path balancing and phase shifting module comprises an output pull-up trigger unit and a four-phase clock path balancing and phase shifting unit. According to the invention, the time resolution, the switching frequency and the dynamic response speed of the digital pulse width modulator can be improved, so that the output voltage ripples of the DC-DC converter and the required size of an off-chip passive device are reduced, and the response speed of the converter under the duty ratio fluctuation condition is further improved.