Abstract: Abstract:Taking "Prunus aviumL."as test material,this paper studied the effects of bagging with non-woven fabric on different period over whole branch on its fruit and leaf quality and the microenvironment within the bags. The results showed that bagging could change the microenvironment of the whole branch, different period bagging has different impact on fruit and leaf quality. Bagging before May 1,the quality of fruit weight is lower than that of the control, others qualities such as fruit soluble sugar, soluble solid ,and sugar/acid ratio and hardness are similar to those of control, What is more, the leaf soluble sugar contents and MDA contents are lower than those of control ,expect the specific leaf weight and photosynthetic pigment content lower . Maybe the microenvironment can improve the qualities both the fruit and the leaf. Bagging after May 5,though the weight is higher than that of the control, and other qualities are also improved, but compared with bagging at May 5, it less effect. Therefore, bagging at May 5 can improve the fruit quality significantly, and the quality of leaf also improved.