Automatic grass seed broadcasting device of unmanned aerial vehicle

The automatic grass seed broadcasting device comprises a grass seed box and a turning cover hinged to an opening in the top end of the grass seed box, an undercarriage is fixed to the bottom end of the grass seed box, and a plurality of connecting pipes which are annularly distributed at equal intervals are fixedly communicated with the side face of the grass seed box. And fan blade driving motors are fixed to the tops of the ends, away from the grass seed box, of the multiple connecting pipes correspondingly, rotating fan blades are fixed to the output ends of the tops of the fan blade driving motors, and spiral conveying and sowing mechanisms are arranged in the multiple connecting pipes correspondingly and used for conveying and sowing grass seeds contained in the grass seed box. According to the utility model, the spiral conveying sowing mechanism is adopted, so that the flying sowing of grass seeds driven by the unmanned aerial vehicle is realized, the rapid and large-area grass seed sowing requirement c