Deer antlers,derivatives of periosteum cells,are the only mammalian appendages capable of full renewal in yearly cycle.Antler regeneration along with the rapid generation of skin,blood vessels and nerves,and a variety of peptides and growth factors are involved,all of that are regulated by a series of complex and sophisticated signal pathways.This paper summarizes the histological progress of antler regeneration and the present research status of signaling pathways thereof,with a focus on signal transduction pathways to reveal the mystery of antler regeneration,with the aim to gain a better understanding of the mechanism of mammalian organ regeneration.