Production line for slitting rolling production of fine-grain high-strength steel bars

The utility model discloses a production line for slitting rolling production of fine-grain high-strength steel bars. The production line comprises a rolling unit and a cooling device. The rolling unit comprises a slitting rolling unit and a final formation rolling unit. The cooling device comprises a temperature control water cooling device I and a temperature control water cooling device II, the temperature control water cooling device I is arranged between the outlet end of the slitting rolling unit and the inlet end of the final formation rolling unit, and the temperature control water cooling device II is arranged at the outlet end of the final formation rolling unit. The production line is simple and compact as a whole; not only is the requirement for the high temperature in the slitting rolling process met, but also finished products can be rolled at low temperature and high pressure, and thus while steel bars are produced efficiently, the comprehensive mechanical properties of the steel bars are improved, the production cost is reduced, good economic and social benefits are created, and the application prospect is wide.