Abstract: An analytical method for residue of fluoroglycofen-ethyl in buffer solutions was established by gas chromatography.The degradation in three different buffer solutions under various temperature was studied.The results showed that the degradation of fluoroglycofen-ethyl followed the first-order kinetics.The half-lives of degradation of fluoroglycofen-ethyl in three different buffer solutions with pH value of 5,7 and 9 were 12.2 d,144.4 h and 85.6 min at 25℃,respectively,and were 10.7 d,13.4 h and 23.3 min at 50℃,respectively.The hydrolytic rate of fluoroglycofen-ethyl increased with the increasing of pH value and temperature in reaction medium.