The invention provides a double-length
cutting device and method for a
continuous casting machine, and belongs to the technical field of
steelmaking continuous casting equipment. The double-length
cutting device of the
continuous casting machine comprises a
cutting unit, the cutting unit comprises a movable frame body, a primary
flame cutting
machine and a secondary
flame cutting machine, the primary
flame cutting machine and the secondary
flame cutting machine are installed on the movable frame body, and the distance between the primary
flame cutting machine and the secondary
flame cutting machine can be adjusted in the running direction of a
casting blank so that the double-length cutting requirement of the
casting blank can be met; the multiple roller
bed units are located below the cutting device, the multiple roller
bed units are sequentially arranged at intervals in the
casting direction, each roller
bed unit is provided with a roller bed and an avoiding mechanism, the roller beds support the casting blanks, and the avoiding mechanisms drive the roller beds to move between the working position for bearing the casting blanks and the avoiding position for avoiding the cutting flame flow; and the
synchronizing unit is arranged on the movable frame body, and the
synchronizing unit controls the movable frame body to be synchronized with the moving casting blank. The equipment investment and workshop construction cost are greatly reduced, and the adaptability and economical efficiency of the continuous casting
production line are enhanced.