Compound preservative was developed and optimized by orthogonal experiment for fresh keeping of Antarctic krill.In order to verify the effect of the preservative,sensory evaluation,TCA-soluble nitrogen contents,TBARS values,juice volume loss,loss rate,texture index and chromatism were tested under the temperature of 2℃.According to the results of orthogonal experiment L9(34),the optimum compositions were:Sorbitol 15 g/L,4-HR 0.1 g/L and phosphate mixture 7 g/L.The loss for TCA-nitrogen contents,juice volume and shrimp loss rate were slowly;TBARS values was decreased;the maximum sheer force of the muscle had a slower decrease rate than blank controls,but it had no significant difference with control group(P>0.05);In CIElab color system,The a* value had a positively linearly related to the change of Antarctic krill's fresh degree.The group treated with compound freshness preservative had a slower growth of a* value.The verification showed that compound freshness preservative had a remarkable effect on Antarctic krill.