In the present paper, we report a facile access to a novel polymer of pyrogallic acid, poly(pyrogallic acid), via an eco-friendly and easily accessible horseradish peroxidase (HRP)/H2O2-catalyzed oxidation process and evaluate the radical scavenging capacity of this new phenolic polymer. In addition, the potent stabilizing effects of poly(pyrogallic acid) on PP were disclosed