Abstract: Based on the previous preparation of the refractory high-entropy alloy cable-type wire materials, the NbMoTaNiCr refractory high-entropy alloy cable-type welding wires were designed and developed. The NbMoTaNiCr refractory high-entropy alloys were formed by tungsten inert gas welding (TIG) rotating wire arc additive manufacturing. The five-factor and five-level forming orthogonal experiments were conducted to study the influence of process parameters on the forming quality of the high-entropy alloys, such as current, electrode spacing, wire feeding speed, and stacking speed. The results show that the current and wire feeding speed have the greatest influence on the forming quality of NbMoTaNiCr refractory high-entropy alloys. With the increase of current, wire feeding speed, and stacking speed, the forming characteristic parameters of weld bead generally show the trend of first increasing and then decreasing. According to the orthogonal experiments, the optimal combination of forming process parameters is the current of 120 A, wire feeding speed of 8 mm·s⁻¹, stacking speed of 120 mm·min⁻¹, gas flow rate of 18 L·min⁻¹, and electrode spacing of 1 mm. The NbMoTaNiCr refractory high-entropy alloys are mainly composed of the face-centered cubic phases and a small amount of μ phases. The average hardness of the alloy formed layer surface reaches HV 911, reaching the amorphous hardness level, the yield strength is 545.5 MPa, the fracture strain is 5.5%, and the fracture mechanism is the cleavage fracture.