Provided is a uniform-rotational-speed width/breadth spacing rice seedling transplanter, comprising a vehicle frame, a seedling tray, and a transplanting mechanism; the transplanting mechanism is provided with a rotating bin (3); the two ends of the rotating bin (3) are provided with transplanting arms, and each of the transplanting arms is provided with a rice-seedling transplanting claw (4); the seedling tray is connected to a seedling tray drive mechanism, the seedling tray drive mechanism is provided with a screw shaft (5), and changing the length of the lead of the screw of the screw shaft (5) achieves a change in the speed of motion of the seedling tray, such that the rice-seedling transplanting claw (4) alternates between actually inserting twice and inserting while empty once; the rotating bins (3) are in sets of three, and the rotating bins (3) in a set are arranged equidistantly; the separation distance between two adjacent sets of adjacent rotating bins (3) is 1.5 to 2 times the separation distance of the rotating bins (3) in a set; each set of rotating bins (3) corresponds to a seedling-carrying plate (1), achieving width/breadth rows and ultimately accomplishing the objective of two-dimensional width/breadth rice seedling transplantation.La présente invention concerne une repiqueuse de plantule de riz conférant un espacement en largeur/envergure à vitesse rotative uniforme, comprenant un châssis de véhicule, un plateau de plantules et un mécanisme de repiquage ; le mécanisme de repiquage est pourvu d'une trémie rotative (3) ; les deux extrémités de la trémie rotative (3) sont pourvues de bras de repiquage et chaque bras de repiquage est muni d'une griffe de repiquage de plantule de riz (4) ; le plateau de plantules est relié à un mécanisme d'entraînement de plateau de plantules, le mécanisme d'entraînement de plateau de plantules est pourvu d'une tige de vis (5), et le changement de la longueur du pas de la vis de la tige de vis (5) modifie la vitesse d