The invention relates to the field of sliding door windows, in particular to an anti-falling automatic cleaning sliding door window. Air inlet channel plugs are movably installed in the bottom ends ofair inlet channels, and first reset springs are fixedly connected to the left sides and the right sides of the air inlet channel plugs; the bottom ends of the air inlet channel plugs are provided with air passing grooves, and air blocking convex blocks are fixedly installed in the air passing grooves; and the bottom ends of the air inlet channels are fixedly connected with air outlet channels. The upper ends of the air inlet channel plugs are in a circular-arc shape, the middle ends of the air inlet channel plugs are in an inward concave arc shape, therefore, when extrusion air bags jet air outwards, the circular arcs of the upper ends can be attached to arc-shaped convex blocks at the bottom ends of the air inlet channels, air only can move towards the air outlet channels, and when air enters the extrusion air bags, gaps between the extrusion air bags and the inner walls of the air inlet channels can be larger in the air inlet process through the inward concave arc-shaped middle ends, and the air inlet speed is higher; the air passing grooves in the bottom ends are in a V-shaped right angle shape, therefore, the resistance is increased when the air passes through the air passinggrooves, and the acting force on the air inlet channel plugs is increased; and the acting force of the air on the air inlet channel plugs is further increased through the curvy wavy air blocking convex blocks which are evenly arranged on the inner walls of the air passing grooves.