A device capable of facilitating ventilation and fixing of a curtain is formed by the ventilating curtain and a curtain fixing device. Two methods are utilized to achieve ventilation of the curtain. The first method is that ventilating holes with gauze are formed in a single layer of the curtain, the ventilating holes are connected with ventilating flexible pipes, and the ventilating flexible pipes are arranged on the front side and the back side of the curtain in a vertical staggered mode. The second method is that the curtain is formed by connecting rows of vertical flat flexible pipes with the made of cloth, vertical staggered ventilating holes are formed in the inner side pipe walls and the outer side pipe walls of the flat flexible pipes, and gauge and supporting parts are arranged in inner cavities of the flat flexible pipes. A column is arranged on a wall under a window, locating pipes with sealing caps are arranged on the two sides of the wall under the column, movable pipes provided with racks sleeve the locating pipes, vertical rods of the movable pipes are connected with horizontal rods with fixing parts, and soft protection pads on the fixing part correspond to the column. Limiting switches corresponding to the two ends of the racks are arranged on the wall and the sealing caps, motors are arranged in wall boxes embedded into partition walls on the two sides of the window, gears are arranged on motor shafts, the gears are meshed with the racks, and the motors and the limiting switches are connected with a controller which is arranged on the wall and provided with a power line.