Abstract: The effect of process parameters on the performance of wire saw was analyzed by self-made composite brush-plating manufacturing device, and the optimum process parameters were found out.Based on making clear the determination of the permissible current density, the effect of process parameters on the distribution density of abrasive grains was investigated by single factor experiment and orthogonal experiment.The experimental results showed that the permissible current density increased and then decreased with increasing felting speed, and the permissible current density reached the extreme value at 300 to 500r/min, when there was no abrasive particles in the plating solution.The main factors affecting the distribution density of abrasive grains were the wire speed, the current density, and the felt speed.The maximum parameters of abrasive distribution density were:wire speed 15mm/min, current density 19kA/m², felt speed 450r/min.