Low-temperature-resistant middle and low voltage power cable and preparation method thereof

The preparation method comprises the following steps: weighing the following raw materials in parts by weight: 40-50 parts of EVA resin, 120-150 parts of PE resin, 30-40 parts of reinforced resin, 6-8 parts of calcium carbonate, 15-30 parts of modified filler and 5-10 parts of dicumyl peroxide, carrying out melt blending on the raw materials at the temperature of 140-150 DEG C to obtain modified resin, and carrying out extrusion molding on the modified resin to obtain the low-temperature-resistant medium-low-voltage power cable. The surface of a conductor is coated with modified resin to form an insulating layer, a wrapping lining layer is arranged outside the insulating layer, the space between the wrapping lining layer and the insulating layer is filled with filler, finally, the wrapping lining layer is coated with the modified resin to form a sheath, the power cable is manufactured, the reinforced resin takes an organic silicon chain segment as a main chain, the low temperature resistance of the modified r