The present invention discloses an overvoltage indication circuit. The circuit comprises a storage battery G1, a 555 time base chip U1, a light-emitting diode D1 and a voltage stabilizing diode DW1. The 555 time base chip U1, a resistor R1, a slide rheostat RP1 and a polar capacitor C1 form a multivibrator, the collector of a transistor T1 for detection is connected with the first pin of the 555 time base chip U1, when the voltage to be detected exceeds a setting value, the voltage stabilizing diode DW1 is broken down to allow the transistor T1 to be subjected to saturation conduction, the multivibrator starts oscillation caused by the connection of a power supply circuit, and the output oscillation signals drives the light-emitting diode D1 to perform luminescence and scintillation. The circuit is simple, the cost is low, the alarm cannot happen, the overvoltage indication circuit is suitable for mute environment and has a good application prospect.