The utility model discloses a flue-cured tobacco greenhouse raising-seedling three-dimensional rotation automatic control device. Two ends of a nursery pond are provided with end supports. Nursery liquid is contained inside the nursery pond. A central rotating shaft is connected between the end supports. Rotating arms are connected on the central rotating shaft in a hinged mode. The ends of the rotating arms are longitudinally connected with tray shafts in a corresponding mode. Fence trays are connected on the tray shafts in a hinged mode. A raising-seedling plate is placed inside each fence tray. A servo motor is sequentially connected with a speed reducer, a shaft coupler and the central rotating shaft. A controller is communicated with the servo motor. According to the flue-cured tobacco greenhouse raising-seedling three-dimensional rotation automatic control device, the traditional floating raising-seedling method that the raising-seedling plates are placed inside the nursery pond in a side-by-side mode is changed, the servo motor is used and controlled to drive the raising-seedling trays to carry out rotary position alternating, the requirement for the nutrient solution inside the nursery pond by the raising-seedling plates is met, the aim of illumination of the raising-seedling plates in the lower layer is achieved, each raising-seedling plate can evenly absorb sunshine and absorb humidity, raising-seedling quality is improved, and the flue-cured tobacco greenhouse raising-seedling three-dimensional rotation automatic control device is applicable to industrialized seedling production.