The invention relates to the technical field of machine tools, and discloses a discharge cleaning system based on kinetic energy recovery. The system comprises a fixing frame, a rotary receiving discand a fixed receiving disc, the highend of the fixed receiving disc is hinged to the rotary receiving disc, the low end of the fixed receiving disc is provided with a discharge outlet, the fixing frame is provided with a driving mechanism, the rotary receiving disc and the fixed receiving disc are each provided with multiple chip removal holes, the upper side of the fixed receiving disc is provided with a gas spray head and a third gas supply mechanism, the two sides of the fixed receiving disc are each provided with a first sliding groove, a first sweeping mechanism is in sliding connection with the interior of the first sliding groove located inthe side, close to the driving mechanism, of the fixed receiving disc, and a second sweeping mechanism is in sliding connection with the interiorof the first sliding groove located inthe side, away from the driving mechanism, of the fixed receiving disc. Waste chip on a receiving mechanism can be removed without stopping work of the whole device.