Multilayer insulated wire

The utility model relates to the technical field of cables, and discloses a multi-layer insulated wire which comprises a plurality of wire cores, the outer side of each wire core is fixedly coated with a polyethylene sheath, the outer sides of the polyethylene sheaths are jointly sleeved with an insulated jacket, and the section of the insulated jacket is arranged in a regular triangle shape. PP rope filler is jointly filled between the insulating jacket and the multiple polyethylene sheaths, the insulating jacket comprises a polyethylene sheath layer, a kraft paper layer and a glass fiber sheath layer, the glass fiber sheath layer is located on the outer side of the PP rope filler and fixedly wraps and sleeves the PP rope filler, the kraft paper layer is located on the outer side of the glass fiber sheath layer and fixedly sleeves the glass fiber sheath layer, and the polyethylene sheath layer is located on the outer side of the polyethylene sheath layer and fixedly sleeves the kraft paper layer. The polyeth