Liquid nitrogen spraying fluidized freezer was used for individual quick freezing( IQF) of blueberries. Freezing process technology and quality changes of frozen samples during storage stage were analyzed in this paper. Multiple linear regression analysis indicated that the suitable process freezing temperature、wind speed and bed height for quick-freezing blueberries in LN 2-spraying fluidized freezer were- 40 ℃,4. 5 m / s and 3. 6 cm. Environmental scanning electron microscopy( ESEM) results showed that the inner microstructure of the fluidized quick-frozen blueberries had better compactness,uniformity and destructiveness than that of control group which blueberries were slowly frozen in- 18℃. Sensory evaluation were used to score the difference of blueberries in external and internal color,firmness and exterior quality between the fluidized quick-frozen and slow-frozen in- 18℃. The results show that the quality of the fluidized quick-frozen blueberries was better than that of the control group.