The invention discloses a 1500V and below DC traction biological destruction resistant power cable for rail transit. The power cable comprises a copper conductor, an insulation layer extruded outside the copper conductor, a waterproof layer wrapping the outer side of the insulation layer, a closed metallic sheath sleeved on the waterproof layer and a thermoplastic or thermoset sheath layer extruded on the closed metallic sheath from the central to the outer layer in sequence, wherein the copper conductor comprises five copper cores which are mutually twisted, an armor layer which is extruded outside the copper cores and a polyester fiber layer which is extruded outside the armor layer of a copper belt and has a thickness of 3mm. The power cable has the advantages of simple structure and capabilities of improving the production efficiency, saving the raw materials and reducing the energy consumption.