Because that plant essential oil has antibacterial and anti-inflammatory function,they are widely applied to the food industries such as meat,fruits and vegetables,dairy,aquatic and bakery products.This paper introduces the extraction methods of plant essential oils,such as water extraction,organic solvent extraction,supercritical CO2(SC-CO2) extraction and solvent-free extraction(pressing method,microwave and ultrasonic extraction).And the advantages and disadvantages of each technique are discussed in the...