Fresh fish which was packed with packaging material having lower O2 permeability(material A) and higher O2 permeability(material D) under vacuum-packaging,custom packaging and CAP(Controlled Atmosphere Packaging)using mixture of O2 and CO2.Influence of packaging technics on quality of the packaged fish was studied.The results show that packaging technics had a remarkable influence on the quality of the packed fish.The higher content of O2 in package was,the steeper change of TVB-N value of fish packed was.The change rate of TVB-N value was 80%O2+20%CO2>custom package>50%O2+50%CO2>vacuum package when the fish is packed with material having lower O2 permeability while the change rate of TVB-N value was custom package>80%O2+20%CO2>vacuum package when the packing material had higher O2 permeability.The higher content of O2 in package was the steeper change rate of TBA value was.