The storage effect of Muscat hamburg Grapes under the treatment of controlled freezing point storage combined with CT-2 preservative was discussed by analyzing fruit quality and physiological and biochemical indexes at different treatments during storage.The result showed that controlled freezing point storage combined with CT-2 preservative could slow down weight loss rate,fruit fallen rate and decay rate.It also reduced total soluble solids,titratable acidity and the loss of Vc.The quality of grapes was maintained,the growth speed of MDA was slowed down and the aging process was delayed effectively.Its POD and SOD activity increased compared to the controlled freezing point storage method,and the accumulation of free radicals was reduced.Therefore the storage time was prolonged.