Abstract: The observation was made of the crude ash and dry matter content were observed of Arundinaria spanostachya after the panda ate it,and the effects of wild giant panda eating were discussed on the accumulation of crude ash and dry matter in A. spanostachya.The results showed that the content of crude ash in the same age-class conditions and the same organs of bamboo was significantly higher than that in the control plots(P<0.05),while the dry matter content was higher than that in the control plots(P>0.05).The content of crude ash in branches and leaves was significantly higher than that in the stem(P<0.05),while the content of dry matter was lower than that in the stem.With the increase of age-class,the content of crude ash increased gradually year by year,while the content of dry matter decreased.There was no obvious influence on the accumulation of the crude ash and dry matter after the giant panda eating.Crude ash and dry matter would not affect the sustainable use of A. spanostachy for wild giant pandas.It was beneficial to the survival and reproduction of the giant panda in the Liziping Nature Reserve.