Copper-clad aluminum wire with insulating layer

The invention discloses a copper-clad aluminum wire with an insulating layer. The copper-clad aluminum wire is composed of a plurality of conductors. Each conductor is composed of a copper conductor, a pure aluminum layer and an aluminum oxide layer, the pure aluminum layers are compounded to the outer surfaces of the copper conductors with the metal compounding technology, stranding is carried out in a multi-braided-wire mode, and a tin coating is arranged outside the conductors. Hard anodizing processing is carried out on the whole outer surface of each conductor to form the corresponding aluminum layer. Sulfuric acid type anodic oxidization liquid is adopted in hard anodizing processing, the oxidization temperature ranges from -8 DEG C to -1 DEG C, and the electric current density ranges from 2 A/dm to 5A/dm .