The invention relates to a blast furnace slag waste heat recovery device and method for iron and steel enterprises and belongs to the technical field of waste heat recovery. A roller and a heat preservation wall in the blast furnace slag waste heat recovery device for the iron and steel enterprises are concentric cylinders, and the roller is located inside the heat preservation wall. The upper side of the heat preservation wall cylinder is provided with a water outlet II, and the lower side of the heat preservation wall cylinder is provided with a water inlet II. The left side of the heat preservation wall is provided with a slag inlet located on the upper portion, and the right side of the heat preservation wall is provided with a slag outlet located on the lower portion. A stirring shaft is arranged at the center of the roller. Impellers are evenly distributed on the hollow center shaft on the stirring shaft. The front end of the center shaft is provided with a water inlet I, and the back end of the center shaft is provided with a water outlet I. The blast furnace slag waste heat recovery device and method for the iron and steel enterprises aim to effectively utilize waste heat of blast furnace slag through recovery, improve the recovery rate of the waste heat of the blast furnace slag and develop the blast furnace slag waste heat recovery technology for the iron and steel enterprises, and therefore the waste heat recovery method is provided for the iron and steel enterprises. The blast furnace slag waste heat recovery device and method for the iron and steel enterprises can be widely applied to waste heat recovery of the blast furnace slag of the iron and steel enterprises.