Method for controlling deviation of intermediate billet of coil box

The invention discloses a method for controlling deviation of an intermediate billet of a coil box, and belongs to the technical field of hot-rolled steel. The method includes sequentially feeding the intermediate billet into a bending roll unit via an inlet-side guide plate and an inlet roll unit; bending the intermediate billet to form a strip billet; coiling the strip billet by a forming roll and a first coil carrying roll of a coiling station sequentially to form a strip coil; uncoiling the strip coil by an uncoiling station, and then shifting the strip coil; and flattening the strip coil by a pinch straightening roll, and then feeding the strip coil into a finishing mill group via a front-side guide plate of a flying shear to be rolled. The method has the advantages that problems of coiling failure of an intermediate coil due to deviation of an intermediate billet and uncoiling failure due to a poor coil pattern are effectively solved; and investment is omitted, the method is simple, and is high in appli