The self-aggregation of chiral threonine-linked porphyrins and their zinc(Ⅱ) complexes in water-alcohol system and water-alcohol-NaCI system has been studied by circular dichroism (CD), UV-Vis absorption spectra and fluorescence spectra methods. The experiment results indicate that chiral threonine-linked porphyrins and their zinc(Ⅱ) complexes have two different kinds of aggregates in water-alcohol system and water-alcohol-NaCI system. And the porphyrins may form highly organized and orientated aggregates in water-alcohol-NaCI system. The aggregates in water-alcohol-NaCI system may have helical structures. The self-aggregation of chiral threonine-linked porphyrins and their zinc (II) complexes in water-alcohol system and water-alcohol-NaCI system has been studied by circular dichroism (CD), UV-Vis absorption spectra and fluorescence spectra methods. experimental results indicate that chiral threonine-linked porphyrins and their zinc (Ⅱ) complexes have two different kinds of aggregates in water-alcohol system and water-alcohol-NaCI system. And the porphyrins may form highly organized and orientated aggregates in water-alcohol- NaCI system. The aggregates in water-alcohol-NaCI system may have helical structures.