Extended photoelectric composite medium-voltage waterproof cable and preparation method thereof

The invention discloses an extension type photoelectric composite medium-voltage waterproof cable and a preparation method thereof. The cable comprises a cable core, a water-blocking wrapping tape layer arranged outside the cable core, an isolation sleeve, a waterproof armor layer and an outer protection layer, the cable core comprises a wire core, an optical fiber unit and a cabling filler; the cabling filler is filled among the wire core, the optical fiber unit and the water-blocking wrapping tape layer; the wire core comprises an insulating wire core, a water-blocking metal shielding layer and a split-phase longitudinal wrapping aluminum-plastic composite layer which are sequentially arranged from inside to outside; each insulating wire core comprises a conductor, a conductor shielding layer, an insulating layer and an insulating shielding layer which are sequentially arranged from inside to outside. And the water-blocking metal shielding layer comprises an inner-layer semi-conductive waterproof layer, a m