In the process of lead-electrolysis, when we take off the cathode lead plate from electrolyte, we should take out the cathode collector bar. Next cathode lead plate will be melted and make into ingot. The cathode collector bar can be used next time. The design is a new kind of appliance of taking out the cathode collector bar. The appliance, which limits the cathode plate horizontally, uses the way of single taking out. It is proved that this way is steady and efficient.