Abstract: Metallurgical slag contains a large amount of valuable metal elements, which should be further enhanced its comprehensive utilization value. By improving the resource utilization rate of metallurgical slag, solid waste can be realized, harmless, reduced and resourced, and then the sustainable development of value-added efficiency of China's metallurgical industry can be promoted. For this, the paper reviewed the research progress of resource utilization of metallurgical slag in recent years. The application of microwave heating technology in the recycling of metallurgical slag was mainly introduced, aiming at providing reference for the rational development and utilization of different metallurgical slag.