Magnetic flux release and circuit breaker

The utility model belongs to the technical field of circuit breakers, and discloses a magnetic flux release and a circuit breaker. The magnetic flux release comprises a mounting frame, a pushing piece, an ejection piece, a first elastic piece, a tripping piece and an electromagnetic driving piece, the pushing piece comprises a push rod main body, a pushing arm and a transmission arm, the push rod main body is rotationally arranged on the mounting frame, and the pushing arm and the transmission arm are arranged on the push rod main body. The ejection part is movably arranged on the mounting frame, the first elastic part is arranged between the ejection part and the mounting frame and can eject out the ejection part, so that the ejection part pushes the transmission arm to rotate, and the pushing arm is pressed to rotate and can enable the transmission arm to abut against the ejection part, so that the first elastic part is compressed. And the jump fastener is rotationally arranged on the mounting frame and can