The utility model discloses a seedling tray seeder belongs to agricultural machine technical field. The input of this machine frame is equipped with presses cave roller support to and the pressure cave roller of support on pressing cave roller support, interval distribution has and is coiled the radial toper spike -tooth that position corresponds respectively by each cave in the transport seedling tray on pressing the cave roller to it pushes away to ordering about the pressure cave locator of pressing the cave roller beginning to move to be equipped with seedling tray, the output of frame be equipped with the support on the seeding support the workbin and be located a set of seed director of workbin one side. Compared with the prior art, the utility model discloses simple structure, seeding precision height to the good basis is established to the quality of growing seedlings for guaranteeing the later stage.