The invention discloses a battery current collector and an alkaline battery. The battery current collector comprises a seal ring component, a cathode bottom cover and a conductor nail, wherein the seal ring component comprises a center cylinder where the conductor nail is inserted, a peripheral part tightly attached with the inner wall of a battery shell, and a connecting part located between the center cylinder and the peripheral part; an air hole is formed in the connecting part; a breathable slice or a breathable film made of expanded polytetrafluoroethylene or polytetrafluoroethylene composite materials is arranged in the middle or the lateral part of the air hole, and prevents alkaline liquid inside the battery outflowing from the air hole. The battery current collector disclosed by the invention has the advantages of combining the breathable slice or the breathable film made of the expanded polytetrafluoroethylene or polytetrafluoroethylene composite materials with the air hole in a seal ring to replace a weak layer in the traditional seal ring, and greatly increasing the service life of the current collector by utilizing the advantages of polytetrafluoroethylene of alkali resistance, high temperature resistance and most difficult aging in plastic. Furthermore, the good permeability of polytetrafluoroethylene is utilized, so that gases slowly generated inside the battery are released, and gases are not accumulated inside the battery.