Brick stacking machine

The brick stacker crane comprises a movable frame, a lifting frame, a middle box, a first clamping plate and a second clamping plate, movable wheels are fixedly installed at the bottoms of two side plates of the movable frame, the lifting frame is arranged in the movable frame in an up-down sliding mode, a lifting hydraulic cylinder is fixedly installed at the top of the movable frame, and the middle box is arranged in the middle of the middle box. The lifting hydraulic pump is connected with the lifting frame, and the middle box is rotationally installed on the lifting frame through a rotating shaft. Four first hydraulic cylinders and four second hydraulic cylinders are installed on the two symmetrical faces of the middle box correspondingly, first clamping plates are fixedly installed on the first hydraulic cylinders through first connecting rods, second clamping plates are fixedly installed on the second hydraulic cylinders through second connecting rods, and the four first clamping plates and the four sec