A CATHODE OF ALUMINIUM POT, including a metal cathode shell of rectangular configuration; a bottom, made of bottom blocks with cathode rods, fixed in them; and a side lining, wherein one part of bottom blocks with cathode rods, fixed in them, is installed perpendicularly to the longitudinal centerline of the pot, and another part is parallel to the longitudinal centerline of the pot; to form the protective freeze on the whole periphery of cathode in the bath zone and the steeply falling bottom ledge in the metal zone the cathode rods, fixed in the bottom blocks, installed perpendicularly to the longitudinal centerline of the pot, being stuck out through the longitudinal sides of cathode shell, and the cathode rods, fixed in the bottom blocks, installed in parallels to the longitudinal centerline of the pot, being stuck out through the end sides of cathode shell.