In order to obtain the best coverage of Ipomoea aquatica floating-bed in pond culture of Qihe crucian carp， Carassius auratus， a total of 360 individuals of Qihe crucian carp were randomly cultured in four groups with coverage of the I. aquatica floating-bed of 0（C0）， 10%（C1）， 20%（C2） and 30%（C3）， respectively， with 3 replicates per group and 30 fish per replicate. After culture for 90 days， the aquaculture water quality， growth， general nutritional composition and amino acid contents were examined， and the differences were compared. The results showed that only the contents of three amino acids （glycine， valine and arginine） were significantly affected by I. aquatica floating-bed coverage （P<0.05）， with the maximum value mostly in group C1， followed by the control. In addition， the changes of valine and arginine contents were consistent with that of weight gain rate among the four treatments. Moreover， compared with C0， the crude protein and ash contents of the three treatments （C1-C3） were higher， and the crude lipid content was lower， among which 10% treatment （C1） exhibited the highest crude protein content and lowest crude lipid content. Therefore， we suggest that 10% I. aquatica floating-bed coverage is most beneficial to the excellent quality of Qihe crucian carp， but too high coverage would have opposite effect.