The invention provides a counter weight method for cathode roller static balance, wherein a test is conducted through a rolling method. Positions and weights which do not meet static balancing moment are determined through a magnet standard mass block weight increasing method and marked; according to the determined positions and weights of unbalanced moment, corresponding counter weight blocks and counter weight rods are manufactured for counter weight on a roller body, and a balance test is conducted again after counter weight till the requirement of the static balancing moment is met. The counter weight method for cathode roller static balance has the advantages that the unbalanced moment generated in the production process of cathode rollers can be eliminated effectively, and the static balancing moment of the cathode rollers after counter weight can be reduced to 5 N.m. Copper foil produced through the cathode rollers is prevented from the phenomena of fractures and wrinkles, and has the advantages of facilitating test operation and being reliable in connection, good in sealing performance and low in cost.