The invention discloses a wire feeding auxiliary device and an operation method thereof. The wire feeding auxiliary device comprises a base, and the wire feeding auxiliary device further comprises a rotation assembly arranged on the base and a supporting positioning assembly arranged on the rotation assembly and used for supporting and positioning a wire. By the adoption of the wire feeding auxiliary device, the twisting force on the surface of the wire is eliminated, the situation that the wire is rotated before entering the molten steel is avoided, the piercing depth is increased, vaporization of the wire on the surface of the steel liquid is slowed down, the wire can enter the steel liquid sufficiently and performs an action, the wire consumption is lowered, the wire yield is increased,and the manufacturing cost of the processes is lowered.