A pre-concentration and GC / MS method was established for the simultaneous determination of CFC-12,CFC-114,CFC-11 and CFC-113 in high mountain. The detection limit of CFC-12,CFC-114,CFC-11 and CFC-113 were 0. 013,0. 022,0. 021 and 0. 030 μg / m~3,the relative standard deviation of the method were under 5. 6%,and the correlation coefficient were above 0. 996. Greenhouse gases of Mount Lushan were monitored. In addition,the results indicated four kinds of CFC concentrations of Mount Lushan were generally hig...