The invention relates to a peanut single-grain precise seed-metering device, especially a single-grain precise seed-metering device aiming at agricultural machinery, and belongs to the technical field of agricultural machinery. The peanut single-grain precise seed-metering device is characterized in that a movable lug seed charge mechanism (6) is movably connected with a gear drive plate (7) through a pin shaft with a torsional spring; the gear drive plates (7) are movably arranged on respective circle center locating bump outer rings of a seed discharge side plate (2) and a seed feeding side plate (4) in a sleeved mode; the seed discharge side plate (2) and the seed feeding side plate (4) are axially located by bolts; a transmission wheel (1) and the drive gear (3) are coaxially installed; power is transferred by the transmission wheel (1) through gears at two ends of the drive gear (3) and gears at two ends of the gear drive plate (7); and a smooth curve surface of the drive gear (3) is tangent with the smooth curve surface of the gear drive plate (7). Thus, the movable lug seed charge mechanism (6) forcibly charges seeds, and the seeds are filled from a seed adding opening (5) and discharged from a seed discharge hole (8) in a single grain form.