The present invention relates to the technical field of phase-cut control circuits, and specifically to a multifunctional new phase-cut control circuit and its implementation method. The multifunctional new type of phase-cut control circuit includes an input interface circuit, a signal detection circuit, a holding current control circuit, a current-limiting protection circuit and a control chip U1. Through multi-mode adaptive algorithms, intelligent detection and compensation, coordinated control and dynamic holding current adjustment, the present invention can maintain stable current compensation when controlling dimmers of different brands and models, improve dimming compatibility, ensure no flicker for low-power loads. Adapt to leading-edge phase-cutting and trailing-edge phase-cutting, and enhance dimming accuracy. Additionally, the circuit is simple and low in cost.