1. In the control group, the turnover rate of hemoglobin radioiron was higher than the appearance of ferritin radioiron in tissues.2. In tne early stage of the acute hemolytic anemia group, the turnover rate of hemoglobin radioiron was higher than the control group and disappearance of hemoglobin radioiron also faster.3. In the acute hemoglotic anemia group, the turnover rate of hemoglobin radioiron was also higher than tissue ferritin radioiron.4. On the examination of the radioautography control group, it was found in the bone marrow normoblasten and reticulocyten that the blackening area increased successively, and on the contrary in the acute hemolytic anemia group, except at an early stage, the blackened areas could not be found.