Cut roses were selected as the experimental materials and vacuum cooled at three different pressure reduction rates (3.11×104 Pa/min

1.78×104 Pa/min

0.62×104 Pa/min). During the vase experiments

the main quality indicators of cut flowers were examined

and comparative analysis were done. The results showed that the different pressure reduction rates had significant influence on the basic qualities of cut roses. The treatment at the medium pressure reduction rate (1.78×104 Pa/min) prevented leakage of the electrolyte

decreased accumulation of the MDA

maintained activity of the SOD

decreased the mass loss

delayed blue changes of the cut roses

prolonged the vase life

achieved the best pre-cooling effect.