Potato minisized breeder seed sower

The invention discloses a potato minisized breeder seed sower and belongs to the technical field of agricultural machines. The potato minisized breeder seed sower utilizes pneumatic seed-metering devices, improves sowing efficiency, reduces reseeding and miss-seeding rates, has a novel, reasonable and compact whole machine structure, and solves the problems of low artificial efficiency and a high production cost. The two pneumatic seed-metering devices are installed at seed openings of the pneumatic seed-metering devices, two seed falling discs are correspondingly arranged at front sides of the two pneumatic seed-metering devices and are connected to a frame, a seed sower main plate is connected to the middle of a front crossbeam of the frame by a connection plate, two seed sower ditchers are arranged in front of the two seed falling discs and are installed on two depth control contour wheels, the two depth control contour wheels are connected to the frame, two soil covering discs are arranged in rear of the two seed falling discs, and the two soil covering discs are connected to a rear crossbeam of the frame by two soil covering disc bases. The potato minisized breeder seed sower is used for potato plantation ditching, groove molding, pneumatic seeding and soil covering.