Discharge opening opening/closing device of horizontal spiral ribbon mixer

The utility model relates to a discharge opening opening/closing device of a horizontal spiral ribbon mixer. The discharge opening opening/closing device comprises a discharge opening and an opening/closing board, wherein one side of the opening/closing board is hinged to the discharge opening; the opening/closing board is controlled by a plane linkage mechanism; a driving rod of the plane linkage mechanism and the opening/closing board are fixed to form an integrated member and are connected with an air cylinder; a driven rod is connected with the side wall of the discharge opening; the air cylinder provides the power source for the plane linkage mechanism so as to realize the opening and closing of the opening/closing board. The discharge opening opening/closing device effectively solves the problem of automatic discharge of the horizontal spiral ribbon mixer.