The utility model relates to a wireless temperature-measurement sensing device for a transformer station of a U-shaped insertion piece type, and the device comprises a wireless temperature sensor body and a U-shaped insertion piece. The wireless temperature sensor body is fixed on the U-shaped insertion piece. A heat conducting surface of the U-shaped insertion piece and a heat conducting surface of the wireless temperature sensor body directly contact with each other and are connected with each other, or are integrated together. Compared with the prior art, the device provided by the utility model is easy to install, is firm in installation, is resistant to high temperature, is accurate in data, and is easy to maintain.