The invention discloses a projector shell capable of resisting skidding and dust. The projector shell comprises a case, a guide rail and a pull rope. An empty groove is formed in the guide rail. A clamping buckle is hinged to the lower surface of the guide rail, the other end of the clamping buckle is connected with the lower surface of the guide rail through a spring, and the pull rope pulls theclamping buckle through the empty groove to rotate around the hinge point. The invention mainly relates to multimedia equipment, and the problem that according to an existing installing method, when the clamping buckle on the guide rail of the case is clamped to an adjusting buckle on a slide way in a wall opening, the case is difficultly pulled out of the wall opening is solved. When the projector shell is applied, and when the pull rope is pulled rightwards, the unhinged side of the clamping buckle rotates towards the bottom face of the guide rail; when the pull rope is loosened, the unhinged side of the clamping buckle is popped by the spring away from the bottom face of the guide rail, and finally the clamping buckle can be controlled at any time so that the case can be easily pulled out of the wall opening.