Casting mould flux is an important auxiliary material in continuous casting production. With the development of China's steelmaking and continuous casting technology, mold slag technology has also been continuously improved. However, in the context of fierce competition in the current steel market, continuous casting is undergoing comprehensive technical upgrades with characteristics such as specialization, constant casting speed, high quality, and multiple varieties. Whether China's mold slag technology can meet the needs of comprehensive improvement of continuous casting technology is a common concern of continuous casting manufacturers, mold slag researchers, and manufacturers.