Abstract: As a calcium-dependent, phospholipid membrane-binding protein, annexin A2 exists as a monomer, heterodimer or tetramer in skin tissue and many cells.Annexin A2 plays a critical role in various skin diseases, including psoriasis, antiphospholipid syndrome, keloids and scar cancer by promoting DNA synthesis in keratinocytes, interacting with macrophages through Toll-like receptor 4, and affecting plasmin system together with β2-glycoprotein Ⅰ(β2GPI).