Abstract:With Trichiurus haumela as the research object，the study investigated the effect of low-voltage alternating electric field on the ice temperature preservation of hairtail.The pH value，total volatile base nitrogen（TVB-N）content，total bacterial count，thiobarbituric acid （TBA）value，trimethylamine content and hematoxylin-eosin（HE）staining results during storage were studied using low-voltage alternating electric field equipment（2 500 and 3 500 V/m）.The results showed that the TVB-N content in the non-electric field group had exceeded the threshold value of qualified products on the 15th day，and the fish body was seriously rotten with a strong fishy smell.After treatment with low-voltage alternating electric field，the preservation effect of hairtail was improved evidently and the shelf life was prolonged for more than 7 d.Moreover，the production of TVB-N during storage was decreased with a slow rising rate，and a larger electric field showed more obvious inhibition effects.Compared with the non-electric field group，the electric field group demonstrated slower changes of pH in the late storage period，improved indicators of the total bacterial count and trimethylamine in the whole storage period and higher freshness，indicating that low-voltage alternating electric field can effectively slow down microbial growth and reduce the oxidative decomposition of fish protein.The study can further optimize the process of electric field preservation and provide a theoretical basis for a new type of ship transportation preservation device and technology development in hairtail ice temperature storage.