Abstract: A curved surface delamination algorithm was proposed for arc additive manufacturing of sprocket chain pocket with large curvature. For the area to be arc additive manufactured, layered design and welding path planning were carried out to obtain smooth and continuous path points, which could well adapt to the curved surface of the chain socket. The results showed that each axis of the robot moved gently and the welding gun run smoothly without speed mutation during welding. The surface of the cladding layer is uniform and smooth, and it is highly consistent with the curved surface of the chain socket. The edges were adapted to the surrounding contours without defects beyond the contour edges. It was confirmed that the obtained path planning algorithm was suitable for the additive manufacturing process of the sprocket chain pocket surface.