The invention provides an electronic acceleration overload relay and a using method thereof. An acceleration signal conversion circuit, a signal processing circuit and a power output circuit containing a relay of the electronic acceleration overload relay are connected in sequence, and a power supply characteristic regulating circuit supplies power for each circuit; the acceleration signal conversion circuit comprises an acceleration sensitive chip and a peripheral circuit thereof, converts an acceleration signal on a set direction into an electric signal and transmits the electric signal to the signal processing circuit; a microcontroller of the signal processing circuit judges the electric signal, if the electric signal meets a set condition, the microcontroller transmits a power output command, and the contact of the relay is closed; and the circuits are arranged in a shell, interface lines of the circuits are led out, and the circuits are encapsulated and fixed. The using method for the relay comprises that: the relay is fixedly arranged in a motion device; the sensing direction of the acceleration sensitive chip is in accordance with the set acceleration direction; and related interfaces are connected with a power supply and a controller. The relay has reliable work, long service life, accurate control and strong environment tolerance; and the power supply characteristic regulating circuit ensures accurate and reliable acquisition and processing of the acceleration signal.