The invention belongs to the field of electric power equipment and discloses a high voltage flexible DC cable. The high voltage flexible DC cable comprises a core layer, a fire protection layer, a shielding layer and a cable insulation layer from inside to outside, wherein the core layer is internally provided with three cable ores, the cable cores sequentially comprise conductors, cable core insulation layers and metal braiding belts from inside to outside, the three cable cores are distributed in a tangent mode, and gaps in the core layer 1 are filled through employing thermal conduction fillers. The high voltage flexible DC cable is advantaged in that relatively good flexibility, pull resistance and high voltage resistance performance are realized.