Abstract: Six-year-old‘Muscat Hamburg’grape was used as the material to study the difference in relative light intensity，yield distribution of leaf canopy，fruit quality and aromatic compounds between 2 types of grape trellis Y frame and vertical trellises. The results showed that there was significant correlation between light intensity，height and width of leaf canopy. The areas with 0.2–0.6 m and 1.8 m in Y frame showed higher photosynthetic than vertical trellises，but the areas with 1.0–1.4 m were lower than vertical trellises. Total sugar and ascorbic acid content was 16.13% and 8.72 mg · kg^-1 in the fruit of Y frame，which were significantly higher than 14.54%，0.40%，16.12% of vertical trellises. However，the procyanidins in the fruit of Y frame was 4.72 mg · g^-1 that was significantly lower than 6.30 mg · g^-1 of vertical trellises. Thirty-two kinds of aromatic compounds were detected in Muscat Hamburg grape of Y frame，which was significantly higher than thirty kinds of vertical trellises，and there was significant difference in the aromatic compounds contents as well. The relative content of terpenols in the fruit of Y frame was 32.91% that was higher than 6.33% of vertical trellises，and the linalool content in the fruit of Y frame was 5.7 times as much as vertical trellises. These results show that the flavor of grape fruit of Y frame was better than vertical trellises.

Key words: grape, frame type, light intensity, quality, aromatic compounds