Abstract: Pterostilbene is a natural antitoxin produced by plants， which exists in plants such as Pterocarpus indicus Willd.，Propolis， Vitis vinifera L. and Vaccinium sect. Cyanococcus.. Pterostilbene has two unique methoxy structures， exhibiting higher bioavailability， lipophilicity and stability than resveratrol， so that it has better absorbed and longer metabolic time in the body. Therefore， pterostilbene has rich biological functions and plays important roles in antioxidant， anti-inflammatory， antibacterial， antiobesity and anti-aging. A detailed review of the absorption， metabolism and biological functions of purple sandalwood was provided， and theoretical references for its application in drug development were offered.