The invention relates to a hot-line work line throwing device which is composed of a bearing plate, a remote control motor, a rotary plate, a gear lever and supports of the gear lever. The remote control motor, the rotary plate, the gear lever and the supports are arranged on the bearing plate. A gap is formed in one side of the bearing plate, the supports of the gear lever are arranged on the two sides of the gap respectively, one end of the gear lever penetrates through holes in the two supports and can move longitudinally, the other end of the gear lever is fixed to the rotary plate through a vertical shaft, and the rotary plate is arranged on a motor shaft and can be driven by the motor to rotate. The hot-line work line throwing device is used in cooperation with a remote control helicopter, aerial line throwing can be carried out at any position and any height of a high-voltage transmission line, and therefore the aim of entering in live wire work is achieved through the cooperation of a line.