Greenhouse ventilation device

The utility model discloses a greenhouse ventilation device, and relates to the technical field of ventilation devices. Comprising a shed frame, a shed body is fixedly connected to the outer wall of the shed frame, ventilation windows are formed in the two ends of the shed body, a mounting plate is fixedly connected to the center of the first side of the shed frame, a ventilation assembly is arranged at the bottom of the mounting plate and comprises a self-locking double-output-shaft motor, and the self-locking double-output-shaft motor is fixed to the bottom of the mounting plate. The solar panel is arranged at the top of the shed body, and the self-locking double-output-shaft motor is started to rotate reversely to drive the rotating shaft, the first bevel gear, the second bevel gear, the connecting rod, the one-way bearing, the first belt wheel, the second belt wheel, the rotating rod, the base, the supporting column and the solar panel to rotate, so that the angle between the solar panel and sunlight is a