Abstract: The effects of electrograinning conditions used for PS plate on grain parameters were studied by simulating industrialization conditions of electrograining in HCl system.Between 0.008~0.016 g/ml of HCl,Ra,Rz and Rq all descended with increasing the concentration of HCl.Rt,Ry and Sm descended at first with decreasing the concentration of HCl,then began to rise at 0.014 g/ml of HCl.With increasing the temperature,Ra,Rz,Rt,Rq,Ry and Sm all inreased and the grains became uniform.With increasing the electric current density,Ra,Rz and Ry all increased and Rt,Rq did not change markedly and Sm had a peak.With increasing the electric quantity density,Ra,Rz,Rt,Rq,Ry,Sm all increased.