The utility model discloses a power line patrols drawing lines plant duster, including magnetron, controller, alternating current power supply, metal seal heating chamber and protection device, pass through between alternating current power supply's the output and the input of controller protection device electric connection, electric connection between the output of controller and high voltage transformers's the input, and electric connection between the input of high voltage transformers's output and circuit rectifier, the output of controller with install electric connection between the cooling fan's of magnetron inside the input, the magnetron is installed in the top in metal seal heating chamber, and electric connection between the output of the input of magnetron and controller, be provided with waveguide port on the magnetron, metal seal heating chamber covers the ground that the surface covered with the plant, copper wire sealing brush is all installed to the both sides in metal seal heating chamber. The utility model discloses herbicidal effect is high, green.