Smelting process of upper calender roll material for photovoltaic glass manufacturing

The invention relates to a smelting process of an upper calender roll material for manufacturing photovoltaic glass by using 1Cr12NiWMoV steel as a material, which comprises the following components in percentage by mass: 0.10-0.20% of [C], 0.15-0.45% of [Si], 0.50-1.00% of [Mn], less than or equal to 0.025% of [P], less than or equal to 0.003% of [S], 0.40-1.00% of [Ni], 11.00-13.00% of [Cr], 0.30-1.00% of [Mo], 0.70-1.50% of [W], 0.10-0.40% of [V], less than or equal to 0.15% of [Cu] and the balance of Fe and trace residual elements. Molten steel is added into an argon-oxygen furnace, decarburization treatment and preliminary reduction are conducted, the molten steel is discharged into a refining steel ladle and then transferred to an LF furnace to be refined and transferred to a VD station to be refined, and gas is removed; after a dead head is hot-cut, electroslag is conducted on an electroslag station, and finally electroslag forming is conducted under the argon protective atmosphere; and the service lif