As the most important technological breakthrough of thermo- mechanical control process for hot- rolled strips, ultra- fast cooling provides important support for the progress of hot rolled strips productions. Based on the development and application of hot rolled strips ultra- fast cooling system, the mechanism of high- intensity homogenization cooling of high- temperature moving strips was explained, and the technology disposing of ultra- fast cooling system in hot rolled lines, the development and application of ultra- fast cooling technology in fine grain steel, high grade pipeline steel, hot rolled dual phase steel, low residual stress steel and other typical products of hot rolled steel strips were emphatically introduced. Based on the advantages of stepless regulation of cooling speed in ultra- fast cooling system, three cooling modes (laminar cooling, enhanced cooling, and ultra- fast cooling) and model system were developed based on ultra- fast cooling equipment, and the rough rolling intermediate slab temperature control system was further combined. A multi- process temperature coordinated optimization control system of NG- TMCP technology based on ultra- fast cooling was constructed, and the application of related technologies has already acquired better effect.