Reasonable path planning can improve the surface quality and strength of the formed parts of Wire and Arc additive manufacturing. Aiming at the characteristics of arc fuse to add material manufacturing, varieties of material manufacturing path planning algorithms are combined, and a compound path planning algorithm is proposed. The single hollow section fill is realized, and the other types of cross section of path planning method is further discussed. In the process of filling section, the inner and outer surface is filled with the contour offset path to ensure the surface quality of the parts. The improved scanning line algorithm is used to fill the parts, reduce the empty stroke and improve the forming efficiency. The complex section profile can be filled and the feasibility of the algorithm is verified by experiments.