The 2319 aluminium alloy samples were deposited by the Wire Oscillating Laser Additive Manufacturing (O-WLAM) process. The optimal parameters were obtained by optimizing process and the effect of deposition parameters on the formability were studied. The results show that the O-WLAM process significantly reduced the porosity and improved the process stability and formability compared to non-oscillating laser. The circular and “∞” oscillating mode obtained optimal formation. The minimum heat input is 12.4J/mm3 under circular oscillating. The smoothest deposition layer was obtained under the condition of 50% overlap ratio. With the increase of the number of deposition layers, the number of pores increases, and the forming is gradually stable. Finally, the deposition samples with good forming are obtained in the circular oscillating mode. Under the deposition state, the tensile strength and elongation in the XYZ direction are 246 MPa and 17.9%, 267 MPa, 8.9%, 266 MPa and 11. 1%, respectively. The anisotropy of the sample is not obvious.