Abstract: The utilization of phytic acid in the aspect of foodstuff, medicine, commodity chemical industry and cutoff flower preservation were discussed. The utilization of phytic acid preservative function on cutoff flower was expected. The results showed: the preservative mechanism of phytic acid on the cutoff flower was that it had the function to improve the capacity of anti-oxidation, to reduce respiratory metabolism and lower the consumption of the energy of the cutoff flower. Phytic acid could be chelate with metal ion of coenzyme easily, which could inhibit or slow down the occurring or the proceeding of the flowers' enzymatic reaction and the fresh period was apparently prolonged.