Agricultural machinery seedling separating device

The utility model relates to the technical field of agricultural machinery, in particular to an agricultural machinery seedling separating device which comprises a box body, a supporting plate is connected to the interior of the box body through a vibration assembly, a discharging opening is formed in the left end of the box body, the left end of the supporting plate is located in the discharging opening, a sliding groove is formed in the supporting plate, and a sliding plate is slidably arranged in the sliding groove; the sliding plate is in threaded connection with a screw rod, the screw rod is rotationally connected with the supporting plate, the right end of the screw rod is fixedly connected with a transmission shaft, the right end of the supporting plate is fixedly provided with a first motor, the output end of the first motor is fixedly connected with the right end of the transmission shaft, and the top end of the supporting plate is provided with a plurality of first sliding grooves communicating with