The utility model discloses a stabilizing device for high-place detection of a contact type ultrasonic sensor, which comprises a base connected with a spherical holder, a clamping groove for mountingthe contact type ultrasonic sensor, an extension cylinder arranged on the base, a first mounting plate arranged above the extension cylinder, the first mounting plate and the extension cylinder relatively fixed, and the clamping groove arranged on the first mounting plate, four supporting legs which are evenly distributed in the circumferential direction are arranged around the extending cylinder,each supporting leg comprises a contact foot, a foot rod and a connecting piece, the contact feet are connected to the top ends of the foot rods, and the connecting pieces are fixedly connected withthe foot rods and the base at the same time. The utility model aims to provide a stabilizing device for high-place detection of a contact type ultrasonic sensor. The problems that in the prior art, contact type ultrasonic partial discharge detection on a GIS equipment pipeline located at a high position is not in place and unstable in contact are solved, and the purposes that it is guaranteed thata sensor is attached to the surface of the GIS pipeline, the sensor is kept stable, and signal interference caused by shaking is reduced are achieved.