Control method for preventing rolling rear-ending of rough-rolled plate blanks and control system

The invention discloses a control method for preventing rolling rear-ending of rough-rolled plate blanks and a control system. The method includes the following steps that after the previous plate blank is roughly rolled by a roughing mill and enters an inlet roller bed of a finishing mill, the first real-time position of the head of the next plate blank and the second real-time position of the tail of the previous plate blank are obtained; on the basis of the first real-time position, the first duration required by the head of the next plate blank to reach the first extreme position is obtained, and the first extreme position is the position corresponding to the head of the next plate blank when the tail of the next plate blank moves to an outlet of intermediate cooling equipment after the next plate blank is roughly milled by the roughing mill for the first pass; on the basis of the second real-time position, the second duration required by the tail of the previous plate blank to reach the first extreme pos