The invention discloses a copper alloy vacuum continuous smelting casting device. The copper alloy vacuum continuous smelting casting device includes a vacuum smelting chamber, a continuous vacuum feeding chamber, a vacuum casting chamber, an upper flow groove, a lower flow groove, a crystallizer, a dummy bar head and a traction machine. The vacuum smelting chamber is provided with a smelting cavity. The smelting cavity is internally provided with a smelting crucible capable of being tilted and returning to the origin. An induction coil is arranged on the melting crucible. The vacuum casting chamber is provided with a casting cavity. A casting crucible is arranged in the casting cavity. The outer side surface of the casting crucible is provided with a heating element. According to the copper alloy vacuum continuous smelting casting device, through matching and using of the vacuum melting chamber, the continuous vacuum feeding chamber, the vacuum casting chamber, the upper flow groove,the lower flow groove, the crystallizer, the dummy bar head and the traction machine, vacuum continuous feeding, continuous smelting and continuous casting are achieved, easily-oxidized metal can be smelted, the stability of alloy texture is ensured, degassing and refining can be conducted on a melt body through vacuum degree adjustment, and the service lives of parts such as the crucible and theflow grooves can be prolonged.