Jacking and loosening structure for jacking and loosening seedlings in seedling tray

The utility model discloses a jacking and loosening structure for jacking and loosening seedlings in a seedling tray, which comprises a plurality of thimbles, a cross rod, a fixing frame and a driving structure, the driving structure is connected with the fixing frame, the plurality of thimbles are arranged at the top of the cross rod, the driving structure comprises a motor and a cam mechanism, and the cam mechanism is connected with the cross rod. The motor drives the transverse rod to move up and down through the cam mechanism. The seedling tray has the advantages that when the seedling tray is conveyed to the position over the ejector pins, the cam mechanism drives the transverse rod and the ejector pins to move upwards, a row of seedlings located over the ejector pins are ejected to be loose by the ejector pins, and after the seedlings are ejected to be loose, subsequent seedling pulling out or blowing out is facilitated. When one row of seedlings are loosened, the cam mechanism drives the cross rod and