Abstract: An experimental device of H-beam controlled cooling was designed and installed, in order to eliminate or reduce the defects of H-beam, such as the inadequate of wing strength and the uneven-distributed of survival stress in the process of rear cooling after rolling. The research trials on controlled cooling of H-beam were carried out. During the controlled cooling process of heavy section H-beam, the cooling rate at wing surface exceeds 20℃/s, the cooling rate at interface of wing and web plate surpasses 30℃/s.The research results are the foundation of installing online controlled cooling equipment.