Method for co-producing TC4 titanium alloy round ingots/flat ingots through VAR furnace and 7-gun cold cathode EB furnace

The invention discloses a method for co-producing TC4 titanium alloy round ingots/flat ingots through a VAR furnace and a 7-gun cold cathode EB furnace. The method comprises the following steps of: averaging within a component range stipulated by the national standards as a datum value; increasing a datum value of an element Al and reducing a datum value of an element V, and then, taking the elements Al and V as proportioning components of brinqueting batch; covering alloy package in proportion, pressing sponge titanium and alloy package into an electrode block, and adopting a plasma welding machine to weld the electrode block into a long electrode; and smelting the long electrode into primary cast ingot through the VAR furnace, and performing secondary smelting on the primary ingot smelted by the VAR furnace through the 7-gun cold cathode EB furnace, thereby obtaining very-large-scale high-quality TC4 titanium alloy round ingots/flat ingots. The method is convenient to operate, can realize control on element