Abstract: The effects of double membrane mulching and early\|stage heating treatment on the temperature， phenophase and fruit quality of 3\|year\|old Fujiminori grape in greenhouse were studied. The results showed that: Compared with the control， the daily maximum temperature of double membrane and heating treatments was decreased by 34℃ and 48℃， whereas the daily minimum temperature increased from 08℃ to 42℃ and 77℃. After double\|membrane mulching and early\|stage heating， the days of high temperature above 40℃ reduced from six days to three days and one day， and the active accumulated temperature increased by 189℃ and 273℃ respectively. In double membrane and heating treatments， the phenological phases such as bud brust， anthesis and veraison were significantly ahead of schedule， and the harvest was advanced to mid\|May. The fruit\|setting rate increased after double\|membrane mulching and early\|stage heating， while the germination rates slightly reduced with a significant reduction in parthenocarpic fruit rate. Compared with the control， the fruit firmness， color， soluble solids and other quality indicators were improved in different degrees. Planting benefits were significantly improved after double\|membrane mulching and early\|stage heating， and the benefit per 667 square meters was improved by 691 percent and 1166 percent compared with the control.

Key words: double membrane, heating, Fujiminori grape, fruit set, fruit quality