Electronic buoy for marking longline fishing main line and control method of electronic buoy

The invention discloses an electronic buoy for marking a longline fishing main line and a control method of the electronic buoy. The electronic buoy comprises a drum-shaped floating body, a controller arranged in the floating body, a solar panel, a rechargeable battery for supplying power as well as a vibrating sensor, a rudder, a propeller, a propeller motor and an obliquely downwards inclined draw bar which are arranged at the lower part of the floating body, wherein the solar panel and the rechargeable battery are arranged on the floating body; the solar panel is electrically connected with the rechargeable battery; the draw bar, the rudder, the propeller motor and the propeller are arranged sequentially from front to back in the advancing direction of the propeller; the draw bar is hinged to the rudder; a tilt angle sensor is arranged on the draw bar; a draw line is connected with the draw bar; the controller is electrically connected with the vibrating sensor, the tilt angle sensor and the propeller motor respectively. The electronic buoy has the characteristics that the electronic buoy can automatically move above a position where the main line and the draw line are connected, and all electronic buoys arranged along the main line can accurately mark the position of the underwater main line.