A system for controlling gatings of a multi-core processor, the system includes a pulse width modulation generator for generating a control square wave; and a phase shifter for shifting a phase of the control square wave to generate control square waves with different phases, and respectively inputting the control square waves with the different phases to a gating of each of multiple processing engines in the multi-core processor. A multi-core processor is provided that includes multiple processing engines. Each processing engine includes a gating, and a system for controlling the gating. Accordingly, in the multi-core processor, the load to be processed in a certain period of a working cycle can be averaged to be processed in a longer period of the working cycle. Consequently, current noise and voltage noise and temperature growth due to the load change can be reduced.