Self-supporting medium-voltage water-blocking overhead insulated cable

The utility model relates to the technical field of power cables, in particular to a self-supporting medium-voltage water-blocking overhead insulated cable, which comprises conductive wire cores, a reinforcing core, a water-blocking filling layer, an outer shielding layer and an outer sheath, a water-blocking layer is lapped on the outer side of each of the three conductive wire cores, the water-blocking layer is arranged to be a water-blocking layer capable of absorbing water and expanding, and the outer shielding layer is arranged on the outer side of the outer sheath. A fastening layer for limiting outward expansion of the waterproof layer is woven on the outer side of the waterproof layer, so that extrusion force can be applied to the center of the conductive wire core after the waterproof layer is expanded; the waterproof layer capable of absorbing water and expanding and the fastening layer for limiting the waterproof layer from expanding outwards are arranged on the outer side of the conductive wire co