The invention relates to the technical field of computers and discloses a convenient and fast computer case perforating device which comprises a box. A cross bar is fixedly connected between the two sides of the inner wall of the box. One side of the inner wall of the box is fixedly connected with a first motor. An output shaft of the first motor is fixedly connected with a first belt pulley. The surface of the first belt pulley is in transmission connection with a second belt pulley through a belt. The axis of a first gear is fixedly connected with the inner wall of the box through a first supporting plate. The front surface of a second gear is fixedly connected with a sliding bar. The surface of the sliding bar is in sliding connection with a sliding plate through a sliding groove. The top of the sliding plate is rotationally connected with a fixing block. According to the convenient and fast computer case perforating device, perforating can be performed effectively, and the positions for perforating can be regulated according to needs at the same time, so that wasting of time is greatly reduced, the working efficiency is improved, the cost is reduced, and objects can be picked up very conveniently and fast; and meanwhile, the stability of the device is greatly improved.