Abstract: The measure of copper and iron content in three cellulose acetate membrane of the zinc-silver battery by using the AIR-C₂H₂ flame atomic-absorption spectroscopy and make synthetically consideration of the measuring conditions and factors were atuded. The method possesses many advantages such as high sensitivity and accuracy, less interference and good repeatability and selectivity. The deviation RSD1.0% comparing to standard value. The standard adding recovery is in the range of 97.3%～98.8%. The proposed method fully suited to the control of copper and iron content in Three cellulose acetate membrane of the zinc-silver battery and to the analysis for sample system with good effect.