The utility model relates to a passive non-contact high-voltage electroscope. The passive non-contact high-voltage electroscope comprises a control box; the upper end of the control box is connected with a detecting head; the lower end of the control box is provided with a connecting rod; the connecting rod is connected with a handle through a connecting head; the control box comprises a rectifier bridge; the positive end the rectifier bridge is connected to one end of a capacitor C1 and one end of a resistor R1; the negative end of the rectifier bridge is connected to the other end of the capacitor C1 and one end of a capacitor C2; the other end of the resistor R1 and the other end of the capacitor C2 are connected to the base of a triode; the emitter of the triode is connected with a second LED group through a first LED group; the positive end of the rectifier bridge is also connected to the collector of the triode; and the negative end of the rectifier bridge is also connected to the second LED group. The passive non-contact high-voltage electroscope of the utility model has the advantages of safety, reliability and avoidance of false display. According to the passive non-contact high-voltage electroscope of the utility model, with connection modes of four LEDs adopted, even if a certain LED is damaged, and the normal work of the other LEDs can be ensured, and the reliability of the device can be ensured.