Most of the greenhouses can only put one layer seedlings, so the utilizing rate of land is lower. If the seedlings trays are overlapped, there is not enough light for seedlings to uptake [11]. Therefore, threedimensional seedlings frame was designed with cantilever beam, which is dropped on every unit of raising seedlings area. There is a special track in the outer end of the cantilever beam, the carpet seeder can run smoothly on two tracks for seeding (Fig. 6.). Every layer of the seedlings frame is equipped with sprinkler system, monitoring system and supplementary lighting system, which ensures the plant to grow