The invention discloses a safety belt storage device and a use method thereof. The device comprises a case, wherein the case comprises a first case and a second case; the case is formed by performing butt joint on the edges of the first case and the second case; the device also comprises a hinge; any one edge of the first case and any one edge of the second case are movably connected through the hinge; connecting buttons are arranged on the other surfaces of the first case and the second case opposite to the surfaces movably connected with the hinge; a first through hole and a second through hole are respectively formed in the side surfaces of the first case and the second case adjacent to the surface movably connected with the hinge and are near one side connected with the button connected surface; meanwhile, a plurality of tiny holes are formed in the side surfaces of the first case and the second case adjacent to the surface movably connected with the hinge; in addition, a plurality of cylinders are correspondingly arranged on the inner surfaces of the first case and the second case adjacent to the surface movably connected with the hinge. The device is convenient for the management of a safety belt in a vacant state; the safety belt is in a ventilation state through the tiny holes; the dryness is maintained.