Abstract: To comprehensively evaluate the effect of Huanglongbing（HLB） on Shatangju （Citrus reticulate Blanco cv. Shatangju）， the fruits were collected from healthy trees and HLB\|infected trees， the indexes of fruit quality including appearance quality traits， fruit internal quality， sensory evaluation and coloring quality were quantitatively evaluated. The results showed that compared with the healthy fruits， the single fruit weight of the fruits picked from HLB\|infected trees were decreased， the total soluble solids content（Brix）， vitamin C（Vc） content ， brix/acidity ratio（TSS/TA）， edible rate and juice percentage were significantly reduced， while the titratable acid（TA） content and fruit firmness significantly increased. The differences in coloring quality of pulp and rind between the two kinds of fruits were significant. The sensory evaluation results showed that the citrus flavor， richness and eating quality of HLB\|infected fruits were apparently decreased compared with the healthy fruits， while off\|flavor degree increased sharply. In summary， HLB showed a significant impact on size， shape， firmness， coloring， sensory evaluation， internal quality and so on， which caused enormous reduction in fruit quality of Shatangju， so more attention should be paid to the prevention and control of HLB\|infected Shatangju.

Key words: Citrus reticulate Blanco cv. Shatangju, Huanglongbing, fruit quality, sensory evaluation