The grape fruit was treated with 0.5 mg/mL mango peel extract and 1% carboxymethyl chitosan composite coating with the Kyoho grape as the experimental material. The preservation effect of grape was evaluated from the rate of decay, weight loss, relative hardness, respiration intensity, titratable acid content, soluble solid content and Vc content, and the effect of the compound coating was also studied.The results showed that compared with the control group, the composite coating could significantly reduce the rate of corruption, weight loss and relative hardness of grape during storage, and d...