Abstract:The quality of Portunus trituberculatus during storage under electric field superimposed superchilling or traditional superchilling condition was studied.To compared the difference between the two methods in aquatic product storage，the physical and chemical indexes，including total volatile base nitrogen （TVB-N），SDS-PAGE gel electrophoresis，degree of lipid oxydation（thiobarbituric acid analysis，TBA），total number of colonies（TVC）and microstructure changes were tested.The results demonstrated that the sarcoplasmic protein in traditional superchilling group aggregated obviously as compared with electric field superimposed superchilling group.The TVB-N of the traditional superchilling group increased faster during storage time.The destruction of muscle fibers in the tradtional superchilling group was much more obvious than that of the electric field superimposed superchilling group.The electric field superimposed superchilling method provided a better effect in preserving quality of Portunus trituberculatus under the same storage time and condition.