Horizontal ruler vertical bubble mounting structure suitable for automatic calibration

The utility model discloses a leveling instrument vertical bubble mounting structure suitable for automatic calibration, which is characterized in that the leveling instrument vertical bubble mounting structure comprises a leveling instrument body, a vertical bubble structure is arranged on one side of the leveling instrument body, and the vertical bubble structure comprises a mounting frame, a bubble frame, a bubble and a sealing cover; the bubble is fixedly connected in the bubble frame, the bubble frame is mounted in the mounting frame, the mounting frame is clamped and fixed in the right side of the leveling instrument body, the sealing cover is clamped with the mounting frame, and a pre-tightening mechanism is arranged in the mounting frame. The bubble frame is additionally arranged between the bubble and the mounting frame, the pre-tightening mechanism is arranged in the mounting frame, and the bubble frame is mounted in the mounting frame and is fixed and pre-tightened through the pre-tightening mechan