The invention provides a transformer voltage wireless measurement device, belongs to the technical field of power transformation, and mainly solves the problems that the cost and the loss are high and potential safety hazards exist to operating personnel when a mutual inductor is used for measurement in the prior art. The transformer voltage wireless measurement device comprises a transformer magnetic circuit and is characterized by further comprising a voltage sampling device, and the voltage sampling device comprises a solitary turn coil, an analog-digital conversion device and a wireless transmitter; the magnetic circuit is wound with the solitary turn coil, the solitary turn coil is close to a tested primary side or auxiliary side coil, the analog-digital conversion device is connected between two ends of the solitary turn coil, an output end of the analog-digital conversion device is connected with the wireless transmitter, and an induction voltage value in the solitary turn coil is transmitted to a receiving device through the wireless transmitter.