The invention discloses a + / -535kV ultrahigh-
voltage flexible direct-current light 
polypropylene insulated 
power cable, and the cable is characterized in that a semi-conductive waterproof layer is arranged outside a direct-current unit, a 
metal armor layer is arranged outside the semi-conductive waterproof layer, an anti-
corrosion layer is arranged outside the 
metal armor layer, an outer protective layer is arranged outside the anti-
corrosion layer, and a semi-conductive layer is arranged outside the outer protective layer; the 
direct current unit comprises a water blocking conductor layer, asemi-conductive Tetoron belt, an inner shielding layer, an insulating layer and an insulating shielding layer which are sequentially arranged from inside to outside, the insulating layer is made of modified 
polypropylene, and the inner shielding layer and the insulating shielding layer are made of a 
direct current shielding material; compared with a cross-linked 
polyethylene power cable, the cablehas the advantages that the 
power cable is reduced by 26%, the long-term 
working temperature is not lower than 110 DEG C, common plastic 
extrusion molding is adopted, the 
extrusion linear speed is higher, no scorch is generated, 
continuous production can be realized, large-length joint-free 
continuous production can be realized, the production efficiency is high, and the process is simple; and the cable has better 
mechanical property, electrical property and insulating strength.