The utility model discloses a high-voltage electrical equipment discharge detector. The high-voltage electrical equipment discharge detector comprises a metal probe, a plastic metal probe rod and an insulated operating rod which are connected in turn. A power supply is disposed inside the insulated operating rod, the power supply is connected with the metal probe via a detection circuit, the detection circuit is connected with a display lamp and a variable resistor, and the plastic metal probe rod is wrapped in a high-voltage insulating layer, so accurate detection for discharge points by means of stretching the probe into electrical equipment at a longer safe distance is effectively realized, and the high-voltage electrical equipment discharge detector can be applied to the detection for discharge points which are in different voltage and current states through adjustment of the variable resistor. Through adoption of the plastic metal probe rod with a telescopic structure, the detector is more convenient to carry and operate. The high-voltage electrical equipment discharge detector is simple and practical, and has low cost and good popularization and application value.