The invention discloses an aluminum-wood outswinging casement window with invisible gauze. The window comprises a window frame and a glass window sash. A longitudinal beam of the window frame is hollow and is internally provided with a spool; a stand column is vertically fixed to the interior of the spool and sleeved with a coil cylinder, and a coil spring is arranged between the coil cylinder and the stand column; the window further comprises the gauze arranged on the coil cylinder, the inner end of the gauze is fixed to the coil cylinder, and the outer end of the gauze is provided with a handle; recessed rails are arranged on the inner sides of an upper cross beam and a lower cross beam of the window frame respectively, and the upper and lower edges of the gauze are wrapped by soft strips which are embedded in the rails and matched with the rails for sliding. The upper and lower ends of the handle are provided with guide blocks matched with the rails for sliding; the guide blocks are provided with telescopic positioning spring bolts, and lock holes matched with the positioning spring bolts are formed in the inner sides of the rails; a drain hole is formed in the lower cross beam of the window frame, the inlet of the drain hole is located in the bottom of the corresponding rail, and the outlet of the drain hole is located in the side, facing outdoors, of the cross beam; the window further comprises a drainage box which is embedded into the drain hole from the outlet of the drain hole.