Device and method for improving tapping reliability of large converter

The invention discloses a device for improving tapping reliability of a large converter. The device comprises a furnace lining measuring tool and a tapping hole structure matched with the furnace lining measuring tool, the furnace lining measuring tool is provided with a furnace lining measuring main arm, and the first end of the furnace lining measuring main arm is provided with an inner clamping hook; The second end of the furnace lining measuring main arm is provided with a chuck and a scale matched with the chuck for use, the tapping hole structure is provided with a sleeve brick, an inner pressing plate is arranged in the sleeve brick, and the inner pressing plate is provided with threads for adjusting the position of the sleeve brick; by using the furnace lining thickness measuring tool and the tapping hole with the flexibly adjustable length, the length of the tapping hole can be completely matched with the actual thickness of the furnace lining in the whole furnace service period, so that the problems