Abstract: Disclosed are an apparatus and a method for actively reducing an action impact of an excavator, and an excavator, which are related to the technical field of engineering vehicles. The method includes: collecting a boom inclination angle, a stick inclination angle, a bucket inclination angle, and state information of an operating lever, of the excavator; determining operation information of the operating lever, and judging whether the boom inclination angle, the stick inclination angle, and the bucket inclination angle are within set ranges; and controlling, based on a judgment result, operating states of an electronically controlled main valve and a main pump of the excavator. The method may reduce impact and vibration generated during operation of the excavator, thereby reducing a failure rate, and improving service life and work efficiency.