Ultra-fast cooling system used for hot rolling production line

The utility model discloses an ultra-fast cooling system used for hot rolling production line comprising a conveying roller (1) and a water spraying device. The utility model is characterized in that the ultra-fast cooling system also comprises roller side plates (2) disposed on two sides of the conveying roller (1) horizontally, and a plurality of water outlet ports (3) are vertically disposed on the roller side plates (2) along the conveying roller (1); an acute included angle can be formed vertically between the outlet direction (p) of the water outlet ports (3) and the conveying roller (1). By adopting the above mentioned technical scheme, the water outlet ports (3) disposed on the roller side plates (2) can form an acute included angle relative to the conveying roller (1) in the vertical direction, thereby the water can be discharged timely, and can be prevented from directly spraying on a driving motor (7) vertical to the conveying roller (1). By arranging a plurality of flow deflectors (22), not only c