Abstract: The relationship between fluoride form transformation and quality change in Antarctic krill was studied through analyzing total volatile base nitrogen( TVB- N),thiobarbituric acid- reactive substance( TBARS) as the quality indicators while Antarctic krill was stored at-20,-40,-80,4,20 ℃. The result demonstrated TVB- N value went up from 9.85 mg /100 g to 31.96 mg /100 g and 30.19 mg /100 g,respectively,when the fresh unfrozen Antarctic krill were stored at 20 ℃ for 10 hours and 4 ℃ for 28 hours,exceeding the limit standard in shrimp of 30 mg /100 g,the TVB- N value were all less than 30 mg /100 g in frozen storage(-20,-40,-80 ℃) for six months.TBARS value both exceeded 1 mg MDA stored at 20 ℃ for 8 hours and 4 ℃ for 20 hours,then reduced along with further oxidation,TBARS value showed no downtrend in frozen storage(- 20,- 40,- 80 ℃) for six months. Total fluoride content showed no significant difference in all the storage conditions frozen storage(- 20,- 40,- 80 ℃) of six months,4 ℃ of 28 hours,20 ℃ of 12 hours. Free fluoride content was always increasing and showed significant difference( p < 0.05).The result demonstrated free fluoride content had obvious positive correlation with TVB- N and TBARS,quality change of Antarctic krill had a greater impact on fluoride form transformation.