Method for reducing rotten steel generated in rolling process of deformed steel bar

The invention discloses a method for reducing rotten steel generated in the rolling process of deformed steel bars. A method for reducing rotten steel generated in the rolling process of deformed steel bars comprises the refining procedure, specifically, a temperature drop detection device is arranged to detect the temperature drop of molten steel in a refining furnace, if the temperature drop is lower than or higher than 0.5-1.5 DEG C/min, the molten steel is heated through an automatic control system, and if the temperature drop is within 0.5-1.5 DEG C/min, the molten steel is cooled to the room temperature; if yes, the molten steel leaves the station and enters a continuous casting procedure through an automatic control system; and in the continuous casting procedure, after the molten steel is solidified and crystallized through a crystallizer, a square billet is obtained, when the pulling speed of the crystallizer is adjusted, the single-time adjustment pulling speed is controlled to be smaller than 0.3 m