Method for controlling rough rolling squat in continuous hot rolling strip

The invention discloses a method for controlling a rough rolling squat in a continuous hot rolling strip. By means of the method, the production efficiency is improved, and the squat in a rolling plate is avoided. According to the method, when plate billets are rolled continuously, a speed difference delta V between an upper working roll and a lower working roll of a rolling mill is determined during rolling process of a roughing mill corresponding to an upper-lower temperature difference delta T of the different plate billets when the plate billets are discharged out of a furnace at a heating stage; then according to the speed difference delta V between the upper working roll and the lower working roll of the rolling mill during a practical production process, revolving speeds of the upper working roll and the lower working roll of the rolling mill are set; so that the squat does not occur on the plate billets during the rolling process; it is not necessary to stop the rolling mill to conduct adjustment and heating treatment on the upper surfaces and the lower surfaces of the plate billets; by the adoption of the method for controlling the rough rolling squat in the continuous hot rolling strip, the product quality is improved, the production efficiency is improved, and the manufacturing cost is lowered.