Method of restoring water cooling pipe of blast furnace cooling wall with boss

The invention relates to a method of restoring a water cooling pipe of a blast furnace cooling wall with a boss. The method comprises the following steps in sequence: I. penetrating a corrugated flexible metal hose in a damaged water cooling pipe, wherein the length of corrugated flexible metal hose is 2.6-3.2m, and the pipe wall of the corrugated flexible metal hose is laminated, the corrugated flexible metal hose is 20mm smaller than the inner diameter of the water cooling pipe; II. connection of a corrugated stainless steel metal hose: hermetically welding two ends of the corrugated stainless steel metal hose with two ends of the damaged water cooling pipe; III. drilling and grouting: at a part of the damaged water cooling pipe, positioned outside a blast furnace shell, drilling vent holes in one end of the water cooling pipe, drilling grouting holes in the other end of the water cooling pipe, grouting resin into the grouting hole through a grouting machine, and filling a gap between the water cooling pipe