Disclosed is a seed compacting device capable of switching between a single row and two rows. The device comprises a copying frame (1), a fixing shaft (2), a hook rack (9), a hook plate (14), two tension springs (11), two first spacer sleeves (6), and two compacting units located on two sides of the copying frame. During the compaction of a single row of seeds, an end, away from the fixing shaft (2), of each of two compacting branch arms (3) is fixedly connected to the hook plate (14), and the hook plate (14) is connected to the hook rack (9) by means of the tension spring (11), which is in an extending and retracting state； the two compacting branch arms (3) are both located between the two first spacer sleeves (6)； and two first compacting wheels (12) are located between two second spacer sleeves (16). During the compaction of two rows of seeds, the two first spacer sleeves (6) are both located between the two compacting branch arms (3)； the two second spacer sleeves (16) are both located between the two first compacting wheels (12)； a second compacting wheel (23) is arranged on a side, close to the copying frame (1), of the end, away from the fixing shaft (2), of the compacting branch arm (3)； and the two compacting branch arms (3) are respectively connected to the hook rack (9) by means of the tension spring (11), which is in an extending and retracting state. The compacting device can not only compact a single row of seeds, but also compact two rows of seeds, thereby improving operation efficiency.La présente invention concerne un dispositif de compactage de semences capable de commuter entre une rangée unique et deux rangées. Le dispositif comprend un cadre de copie (1), un arbre de fixation (2), un support de crochet (9), une plaque de crochet (14), deux ressorts de tension (11), deux premiers manchons d'espacement (6) et deux unités de compactage situées sur deux côtés du cadre de copie. Pendant le compactage d'une rangée unique de semences, une extrémité, é
