Off-line washing device for base plate of hot continuous rolling finishing mill group

The utility model relates to an off-line washing device for a base plate of a hot continuous rolling finishing mill group. The off-line washing device has a simple structure and strong practicability and comprises a cross beam, a sliding track, a washing box, a turnover plate, a pulley type chain block, hoistable brackets and moving wheels, wherein the sliding track is arranged on the cross beam, the upper ends of the hoistable brackets are connected with the sliding track through movable pins, and the lower ends of the hoistable brackets are provided with the moving wheels; the middle part of the sliding track is provided with the pulley type chain block, and the washing box is provided with the turnover plate; and the washing box is welded with a hydraulic trolley, and the bottom of the washing box is additionally provided with a valve.