A screen fixing apparatus is provided, for fixing a screen on a support base. The screen fixing apparatus includes a plurality of fixing holes, a plurality of screw hole structures, a plurality of position limiting structures, and a buckling structure. The fixing holes is provided on a back plate of the screen. The screw hole structures is respectively disposed in the fixing holes. The position limiting structures is disposed on the support base, and correspond to the fixing holes. The buckling structure includes a plurality of fasteners, where the fasteners movably extend into the fixing holes, to buckle the position limiting structures to the corresponding fixing holes.