Abstract: In order to study the controlling effects of curtains against fruit flies and quality improvement of bayberry by hanging curtains， individual bayberry cv. Dongkui tree was treated in Linhai， Zhejiang Province in 2012-2013. It was shown that the occurrence of fruit flies in bayberry was significantly decreased. The weight of bayberry fruit was increased by 218 g on average， and the fruit firmness was increased by 014 kg·cm-3. The fruit ripening time was postponed by more than 3-4 days. The storage period was extended， and the color was brighter. The average economic value of each bayberry tree was increased by 7719 Chinese yuan. It was a new safe measure to control pest by hanging curtains， the quality of bayberry fruits was improved， and the economic value was increased. Therefore， it has a good prospect in the production of bayberry．

Key words: bayberry, curtains, fruit flies, economic benefit