Copper electrolysis current density is an important technical indicators to measure the level of produc tion technology,copper cathode production is proportional to copper electrolysis current density.Increasing cur rent density can explore the potential of existing equipment.The production experiences of increasing copper electrolysis current density,modificating equipment and adjusting process control parameters,strengthening as sessment of operation and job responsibility in Yantai Penghui Copper Co.,Ltd were introduced.