Abstract: Packaged cobia under different conditions during modified atmosphere packaging and freezing-point storage, the effects on the quality of cobia were studied to determine the best packaging parameter. The experimental group of different gas ratio were taken 100% N2, 75% N2+25% CO2, 50% N2+50% CO2, 30% N2+ 65% CO2+5% O2, 25% N2+75% CO2, 100% CO2as study object, and packaging bags of different materials were taken PE, general barrier property and high barrier as study object, the control group was air storage. Stored at a temperature range of-1.01 to 0℃ after modified atmosphere packaging, some quality indexes such as K value, TVB-N value, total bacterial number and drip loss were measured during storage. The results showed that, to varying degrees, an increase was founded for all indexes through the storage period, and there was significant difference (p<0.05) between the experimental group and the control group. Taken slower growth of K value, TVB-N value, total bacterial number and less drip loss as evaluation standard, after the comprehensive comparison of these quality indexes, the high barrier and a gas ratio of 50% N2+50% CO2were determined as the best modified atmosphere packaging and freezing-point storage parameter.