Abstract: A quick and effective method which is used to detect the heavy metals-mercury in food was established. After microwave digestion and sulfhydryl cotton( SCF) enrichmentand separation of mercury ions in acidic solution,based on the dodecyl benzene sulfonic acid sodium salt react with thiomichler's ketone( TMK) to form micelles solubilization complexes,the microwave digestion-SCF separation and enrichment of micellarsolubilization spectrophotometry method was developed for the determination of Hg2 +in tea. The resolution power of 400 W,digestion time for 5 min,dodecyl benzene sulfonic acid sodium TMK 2 m L at p H 4. 5 was the best condition. The detection of mercury content in longjing tea was 0. 013 9 mg / kg,the linear correlation coefficient was 0. 999,method recovery was99. 91%. The RSD was 4. 0%. The method to improve the selectivity and sensitivity and microwave digestion can save energy and time; it also has little pollution and can decompose samples completely,especially it can avoid the loss of mercury as much as possible. The approach was applied to determine trace amount of Hg in tea.