Extraction method capable of increasing oil-extracting rates of volatile plant essential oils and improving quality of volatile plant essential oils

The invention provides an extraction method capable of increasing oil-extracting rates of volatile plant essential oils and improving quality of the volatile plant essential oils. A steam distillationextraction technology is adopted, and combined ultrafiltration membrane damping separators with significantly-different surface properties and functions are additionally installed in oil-water separation processes of the extraction technology. Cold traps are additionally arranged on pipelines, which communicate with the outside world, of oil-water separators, ultrafiltration membrane damping separators with amphiphobic surfaces are additionally installed in cold trap outlets, ultrafiltration membrane damping separators with lipophilic and hydrophobic surface properties are installed on the sides, close to the oil-water separators, of pipelines which lead to the essential oils (or essential oil receivers) in the oil-water separator processes (oil-water separation processes), ultrafiltration membrane damping separa