Door opening/closing device of stacker

The utility model discloses a door opening/closing device of a stacker. The door opening/closing device for the stacker comprises two discharging doors which are supported in a pair of wall plates of the stacker, wherein a first fixed bracket is fixed on one of the wall plates; an air cylinder is arranged on the first fixed bracket; a piston rod of the air cylinder is connected with a connecting guide plate; the left and right ends of the connecting guide plate are respectively connected with a rack; the two racks are respectively meshed with gears which are respectively fixed on door shafts of the two discharging doors; when the connecting guide plate moves to one direction, the two discharging doors can be driven to rotate in the direction opposite to the rotating direction; a door-opening limiting device and a door-closing limiting device are arranged on the wall plates; and gear guide devices which are used for guiding the racks to steadily operate and reliably meshing the racks and the gears are arranged