Abstract: The experiment was carried out from 2007 ~2008 on NJC19 yellow peach trees by long pruning. The effect of studying on tree growth and fruit quality with long pruning showed that the leaf area increased about 15.5% and the net photosynthetic rate improved. The proportion of water sprout and developmental branch decreased, and the number of top quality branch increased. The contents of soluble sugar and soluble starch were higher than those with traditional "short pruning". Both the Soluble solid content and the titratable acid content increased. In addition, long pruning significantly improved the fruit exterior qualities.