Abstract: The Abbe-Bode＇s spatial filtering wave method is used to make sweat fingerprints appear on either glass or transparent incasements, then the sweat fingerprints is extracted and studied. This result indicates that the method making the sweat fingerprints appear on some transparent thin films has good effect. This method has no damage to a testing factor, but chemical reagent method has damage to a testing factor

Key words: sweat fingerprints, filtering wave in optics