The invention discloses a special cold-resistant and anti-freezing polyethylene cable material for outdoor cables and a preparation method therefor. The cable material is characterized by being prepared from the following raw materials in parts by weight: 90-100 parts of polyethylene, 10-15 parts of red phosphorus, 3-5 parts of paraffin, 0.5-1 part of silane coupling agent kh570, 15-25 parts of nano calcium carbonate, 0.8-1.6 parts of polyvinyl alcohol, 2-4 parts of copper powder, 5-8 parts of polystyrene resin, 1-3 parts of zinc borate, 5-10 parts of pentaerythritol stearic amide, 2-3 parts of castor oil, 2-4 parts of triglycol diisocaprylate, 3-5 parts of urea and a proper volume of anhydrous ethanol. According to the special cold-resistant and anti-freezing polyethylene cable material for the outdoor cables and the preparation method therefor, the production process is simple, the process is safe and controllable, and the product performance is high, so that the cable material is suitable for large-scale production.