Plant sterile growth device

The utility model relates to the technical field of plant tissue culture, and discloses a plant sterile growth device which comprises a sterile bottle and a sterile cover, the sterile bottle is in threaded connection with the sterile cover, a sealing ring is arranged at the bottom of the sterile cover and makes contact with the top of the sterile bottle, a limiting groove is formed in the middle of the sterile cover, and a fixing disc is fixed to the bottom of the limiting groove. A plurality of air inlet holes I are formed in the fixed disc; the circular block is pressed downwards under the action of the clamping mechanism, so that the fixed plate can be driven to move upwards, air can flow into the limiting groove from a gap between the fixed plate and the sterile cover, and the rotary disc can rotate by rotating the circular block, so that the sterile cover can be conveniently and quickly fixed. The first air inlet groove in the fixed disc and the second air inlet groove in the rotary disc can form an air