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.