The invention discloses a high-frequency partial discharge detection device, which comprises a sensor. A shielding belt is arranged around a basin-type insulator at the air chamber connection place of a detected electric appliance. The shielding belt is provided with a hole matched with the sensor. The sensor is arranged on the surface of the basin-type insulator in the hole of the shielding belt. A sensor shielding cover covers the sensor, and the sensor shielding cover is in the shape of a box cover. The sensor is arranged in the cavity of the box cover. A connection plug of the sensor is arranged in a hole in the box cover and is exposed out of the hole. The lower end of the sensor shielding cover is arranged a flanged hole in a sensor shielding splicing tape on the shielding belt. The lower surface of the sensor shielding splicing tape is spliced with the shielding belt, and the flange edge of the flanged hole is spliced with the side surface of the sensor shielding cover. The high-frequency partial discharge detection device has the substantial advantages of high detection precision and convenient and quick detection.