The invention provides a multi-groove pulling type file storage box and a using method thereof. The multi-groove pulling type file storage box comprises a file storage box body, a file storage bag rail, a handle plate, and a file storage bag support. A storage-box box body, a limit side rail, the handle plate, file storage bags, a handle groove, the file storage bag rail, the file storage bag support, a rail clamping edge, a limit groove, a telescopic spring mounting groove, a telescopic spring, a rail connection clamping port, a file storage bag support sliding groove, a connecting hook, a movable fastener, a pull rope connecting hole and a storage bag side cloth connecting groove are arranged on the file storage box body. A telescopic type design is adopted for the inside of the file storage box body, and each of the file storage bags can stretch out and draw back. According to the installation conditions, a large number of files can be contained in the file storage box body, and many file storage bags are arranged in one file storage box body. The multi-groove pulling type file storage box is novel and reasonable in design, and files can be classified and placed conveniently.