In order to explore the influence of different machining paths and their arrangement on workpiece grinding effect, the influence law of robotic grinding paths on workpiece surface quality was studied. Based on Preston removal equation and Hertz contact theory, the material removal depth model of abrasive belt grinding was established. Then the formation mechanism of surface residual texture was analyzed. Taking curved aero-engine blades as experimental objects, equidistant paths and cycloidal paths were used respectively for machining experiments on a self-built robotic grinding system. Material removal effect and surface texture were analyzed. The experimental results show that the traditional linear machining isometric path produces strip texture at the joint. Because of its multi-directional machining action, the cycloid homogenizes the surface texture and improves the consistency of machining surface.