The invention relates to a self-deicing leaky coaxial cable and a manufacturing method of the self-deicing leaky coaxial cable. The self-deicing leaky coaxial cable is especially suitable for solving the problem that ice hanging exists when a leaky coaxial cable is used at icing areas. The self-deicing leaky coaxial cable is composed of an outer sheath, heating wires, an outer slotting conductor, a polyethylene foam insulation layer and an inner conductor from outside to inside, the heating wires of one set are arranged between the outer cable sheath and the outer slotting conductor, a copper wire braiding layer of the heating wires is tightly attached to the outer slotting conductor, the outer slotting conductor is provided with a leaky slotted hole, and the heating wires are opposite to the leaky slotted hole of the outer slotting conductor by 180 degrees. The manufacturing method of the self-deicing leaky coaxial cable comprises the first step of preparation of the inner conductor which can be a copper-clad aluminum pipe or a smooth copper pipe or an embossed copper pipe, the second step of pretreatment of the inner conductor, the third step of formation of the polyethylene foam insulation layer outside the pretreated inner conductor in an extruding mode, the fourth step of production of a copper strip of the outer slotting conductor, and the fifth step of longitudinal wrapping of the outer conductor, pay-off of the heating wires, extrusion of the outer sheath, and cooling formation through a cold water tank, thereby obtaining the self-deicing leaky coaxial cable.