The present invention discloses a seed arrangement device, which comprises an upper plate and a lower plate. The upper plate and the lower plate are provided with through holes staggered at a certain distance from each other. The through hole in the lower plate is connected with a seed outlet. A movable plate capable of moving is arranged between the upper plate and the lower plate. The movable plate is also provided with a through hole. The through hole horizontally moves back and forth along with the movable plate so as to be respectively aligned with the through hole in the upper plate and the through hole in the lower plate. By means of the seed arrangement device, each seed is sown each time and the seeding under drought is especially enabled. The seed arrangement device is simple in structure and high in efficiency.