The invention relates to an outdoor 10kVT structure overhead line prepaid electricity selling device, comprising a high-voltage signal acquiring device, an intelligent judging device and an actuating mechanism; the high-voltage signal acquiring device and the actuating mechanism are arranged in a same box body, wherein the high-voltage signal acquiring device is arranged at the high-voltage side of a high-voltage power supply system and used for acquiring high-voltage electric energy signals, and the output end of the high-voltage signal acquiring device is connected with the input end of the intelligent judging device; the intelligent judging device is a main control core and receives input signals of the high-voltage signal acquiring device, and the output end of the intelligent judging device is connected with the actuating mechanism; and the actuating mechanism comprises a vacuum contactor and a braking and closing brake control circuit thereof and controls the cost of the load under the control of the intelligent judging device. The device has the advantages of effectively avoiding the phenomenon of default of electricity charge, having accurate control of a braking and closing brake, maintenance free, long service life, small volume and flexible installation, being capable of meeting the requirements of different environments outdoors, and also being capable of effectively preventing the phenomenon of electricity stealing.