Steam distillation (SD), solvent extraction (SE) and supercritical CO₂ extraction (SFE-CO₂) were individually used to extract the essential oil in mango peel. The components and contents of essential oil were analyzed by gas chromatography-mass spectrometry (GC-MS). A total of 80 compounds were identified in essential oils obtained by the three methods, including 22 terpenes, 8 hydrocarbons, 19 alcohols, 8 carboxides, 14 esters and 9 acids. The three methods detected 49 (SD), 56 (SE) and 59 (SFE-CO₂) compounds respectively. Comparison of the three methods showed, SD suit for the extraction of low boiling point and volatile compounds, SE suit for the extraction of esters and acids, SFE-CO₂ was the most effective method which could keep the components of essential oil of mango peel.