A novel pulling type computer dust-proof device is provided, a shell is fixed on the upper end surface of a case and an opening corresponding to the position of the storage box provided inside the case is formed at one end of the upper case surface of the case, the telescopic dust-proof device is connected with a cover plate arranged in the shell and located at the opening, and the telescopic dust-proof device tighten the dust-proof or withdraws the upper end face interface of the case while the telescopic dust-proof device drives the cover plate to telescopic and realizes the cover plate to cover or open the storage box. The telescopic dust-proof device can realize that the cover plate closes the storage box when the interface of the telescopic dust-proof device is close to the dust-proofdevice, or when the telescopic dust-proof device is retracted and separated from the interface, the storage box is opened, so as to facilitate the storage of the removable hard disk and the U disk, avoid the phenomenon of losing due to the
improper storage of these small tools, and the device has a good dust-proof effect on the interface, has a simple structure and is convenient to operate, and provides convenient storage conditions for
office staff.