The utility model discloses an easily separatable overhead cable which comprises a steel wire and two copper conductors that are respectively coated by a polyethylene layer. A first sheath layer coats the outer surface of the two copper conductors. A second sheath layer coats the outer surface of the steel wire. An elongated connecting part is arranged between the first sheath layer and the second sheath layer. The left side and the right side of the elongated connecting part are respectively provided with a V-shaped groove. The V-shaped grooves are arranged at the middle part of the elongated connecting part. A first polyethylene rope and a second polyethylene rope are arranged in the elongated connecting part and are respectively arranged at two sides of the V-shaped grooves. The polyethylene layer is internally provided with a plurality of air vents. The overhead cable provided by the utility model can easily reduce a dielectric constant of an insulating layer and furthermore has functions of: reducing capacitance, improving transmission performance of the cable, preventing crosstalk, improving flexibility, and preventing outer sheath layer crack caused by frequent bending.