A safe and effective method for separating albumin from autoplasma by heatwas introduced.Immunological analysis,showed that such an albumin solutionhad the same identity as human serum albumin.Determination by acetate cellu-lose electrophoresis showed the purity of the albumin was over 90%.Determination by polyacrylamide gel electrophoresis showed that one of thealbumin monomers was over 97%.Detection by double radial immunodiffusionindicated that there were no any new antigens in it.The recovery of the albuminwas more than 80%.