Provided are a circuit for detecting an abrupt change in a voltage, a reset circuit and an electronic device. The circuit for detecting an abrupt change in a voltage comprises: a discharging circuit (1); and a bleeder circuit (2). The bleeder circuit (2) comprises a second capacitor (C2) and a third capacitor (C3) mutually connected in series. A connection point where the second capacitor (C2) and the third capacitor (C3) are connected is an output terminal of the bleeder circuit (2). The other end of the second capacitor (C2) is connected to a controlling power source (VCC). The other end of the third capacitor (C3) is connected to ground. Upon an abrupt change in a voltage of the controlling power source (VCC), the output terminal of the bleeder circuit (2) outputs a first level signal. The discharging circuit (1) comprises a fourth resistor (R4). The fourth resistor (R4) has one end connected with the end of the second capacitor (C2) connected to the power source and the other end connected with the end of
