In this study, with cryogenic refrigeration（4 ± 0.5） ℃ as the control, the modified atmosphere packaging（MAP） was adopted and combined with cryogenic storage（4 ± 0.5） ℃ to study the effects of MAP methods of O₂, CO₂and N₂in different volume proportions on blueberry freshness preservation by using the fruit of the blueberry variety 'Huilan' as the test material. The results showed that MAP could effectively delay the rate of fruit decay and inhibit the decline of fruit firmness, titratable acid, soluble solid and soluble sugar. The best results were obtained by filling in 9% O₂+ 9% CO₂+ 82% N₂. When stored for 45 d, the firmness of blueberry fruits was 0.34 kg/cm², the soluble solid content was 12.37%, the soluble sugar content was 9.72%, the titratable acid content was 0.84% and the fruit decay rate was 4%.