NOVELTY - Production of photovoltaic cable involves placing conductor wire core containing regularly twisted copper wires in extruding machine, extruding electrical insulation layer, and flame-retarding insulation layer, and then, extruding radiation crosslinking flame-retarding polyolefin sheath containing FPV-type crosslinkable polyolefin base material, superfine halogen-free flame retardant and smoke suppression agent, plasticizer, flame retardant, alkyl phenol anti-aging agent, XPO-type auxiliary-sensitive agent, ultraviolet absorbent and phenolic antioxidant.    USE - Production of photovoltaic cable (claimed).    ADVANTAGE - The photovoltaic cable has favorable flexibility. The insulation layer in the cable has tensile strength of 18 Mpa, and elongation at break of 380%. The sheath in the cable has tensile strength of 20 Mpa, and elongation at break of 380%.    DETAILED DESCRIPTION - Production of photovoltaic cable involves preparing conductor wire core containing regularly twisted copper wires, placing conductor wire core in extruding machine, extruding electrical insulation layer, and flame-retarding insulation layer, such that electrical insulation layer is arranged at inner side and flame-retarding insulation layer is arranged at outer side, and extruding radiation crosslinking flame-retarding polyolefin sheath at outside of flame-retarding insulation layer. The sheath contains 30-60 wt.% FPV-type crosslinkable polyolefin base material, 1-20 wt.% superfine halogen-free flame retardant and smoke suppression agent, 1-10 wt.% plasticizer, 0.20-10 wt.% flame retardant, 0.5-5 wt.% alkyl phenol anti-aging agent, 2-10 wt.% XPO-type auxiliary-sensitive agent, 2-6 wt.% ultraviolet absorbent and 1-5 wt.% phenolic antioxidant. The extrusion temperature of electrical insulation layer and flame-retarding insulation layer are same. The photovoltaic cable has compatibility with respect to photovoltaic radiation crosslinked polyolefin material and photovoltaic radiation crosslinking flame-retarding polyolefin material. The electrical insulation layer contains 75-90 wt.% FPV-type crosslinkable polyolefin base material, 4-19 wt.% alkyl phenolic antioxidant, 1-10 wt.% plasticizer, 3-15 wt.% XPO-type photosensitizer, 1-5 wt.% co-crosslinking agent, and 0.5-5 wt.% processing aid. The flame-retarding insulation layer contains 30-60 wt.% crosslinked polyolefin base material, 1-10 wt.% superfine halogen-free flame retardant and smoke suppression agent, 1-10 wt.% plasticizer, 0.5-5 wt.% flame retardant, 0.5-5 wt.% alkyl phenolic antioxidant, 0.6-10 wt.% XPO-type auxiliary-sensitive agent, 5-10 wt.% co-crosslinking agent and 2-6 wt.% processing aid.