The streamline layering technique is proposed in this study to tackle the ternary blade laser cladding formation trajectory problem. The main base surface is evenly spaced along the radial direction to obtain arc slices perpendicular to the radial direction, which are then evenly spaced along the scanning direction to obtain the segmentation unit. The streamlined layering technique is proposed in this study to solve the problem of ternary blade structural parts layering, bending, and inclination, and to accomplish the accumulation of ternary blade forming parts. The inspection results of the formed parts are as follows: the surface of the ternary blade-formed parts is smooth, and the average surface roughness value is less than 4.065 μm, which effectively reduces the step effect; it achieves a good metallurgical combination with the irregular base surface, and the average thickness of the formed parts is 5.97 mm. The relative errors of thickness and torsion angle are from -1.4% to 1.03% and -4.67%, respectively. The forming accuracy is high. The heat accumulation at the laser molten pool is evident as the height of the formed part increases. Further, the microhardness reduces as the microstructure increases; the microhardness of the formed part ranges from 348.3 to 360.4 HV, and the metallographic structure is uniformly dense with no evident holes or cracks.