A protector for a vehicle-mounted black box, the protector comprising an inner shell body , an inner cover body , a data storage module and a cable ; wherein, the data storage module is placed in the inner shell body ; an opening end of the inner shell body is firmly connected to the inner cover body ; the cable has one end connected with the data storage module , and the other end runs through the inner cover body for external data transmission; the protector also comprising a damping material , the damping material being filled in a gap between the data storage module and the inner shell body ; the protector also comprising an outer shell body and an outer cover body ; wherein, an opening end of the outer shell body is firmly connected to the outer cover body ; the inner shell body is placed in the outer shell body ; and the end of the cable that runs through the inner cover body extends out of the outer cover body for external data transmission; characterized in that the protector also comprises a protective layer, the protective layer being sleeved on an outer wall surface of a portion of the cable that extends out of the outer cover body , the protective layer is specifically a rubber sleeve , wherein a notch is opened along a length direction of the rubber sleeve , so as to facilitate the rubber sleeve to be sleeved on the outer wall surface of the cable ; further comprising a protective cylinder for protecting the cable outside the outer cover body ; wherein, the protective cylinder is sleeved on an end of an outer wall of the protective layer that is close to the outer cover body , and is firmly connected to the outer cover body ; wherein an inner wall of the protective cylinder has an internal thread opened at an end connected with the outer cover body , and the outer cover body has an annular protrusion integrally formed, in a direction perpendicular to the outer cover body , around a hole in a middle portion on a surface to be connected with the protective cylinder , an outer wall of the annular protrusion is equipped with an external thread, and the external thread of annular protrusion is connected with the internal thread of the protective cylinder . the protector also comprising an outer shell body and an outer cover body ; wherein, an opening end of the outer shell body is firmly connected to the outer cover body ; the inner shell body is placed in the outer shell body ; and the end of the cable that runs through the inner cover body extends out of the outer cover body for external data transmission; characterized in that the protector also comprises a protective layer, the protective layer being sleeved on an outer wall surface of a portion of the cable that extends out of the outer cover body , the protective layer is specifically a rubber sleeve , wherein a notch is opened along a length direction of the rubber sleeve , so as to facilitate the rubber sleeve to be sleeved on the outer wall surface of the cable ; further comprising a protective cylinder for protecting the cable outside the outer cover body ; wherein, the protective cylinder is sleeved on an end of an outer wall of the protective layer that is close to the outer cover body , and is firmly connected to the outer cover body ; wherein an inner wall of the protective cylinder has an internal thread opened at an end connected with the outer cover body , and the outer cover body has an annular protrusion integrally formed, in a direction perpendicular to the outer cover body , around a hole in a middle portion on a surface to be connected with the protective cylinder , an outer wall of the annular protrusion is equipped with an external thread, and the external thread of annular protrusion is connected with the internal thread of the protective cylinder . <EOS>