This paper report the Hf isotope compositions of volcanic magmatic rocks from Xiongcun Porphyry copper gold deposit, Tibet. Volcanic magmatic rocks are divided into two groups based on U Pb dating and Hf isotope. The first group is early to middle Jurassic volcanic magmatic rocks: ore bearing andesitic tuff, pre mineralization hornblende quartz diorite porphyry, syn mineralization quartz diorite porphyry, quartz diorite porphyry with bigger quartz eyes, and andesite dyke crosscutting ore body. The second group is Eocene biotite granodiorite. The first group volcanic magmatic rocks are characterized by similar depleted Hf isotope composition and young model age. The initial value of ε Hf( t ) are +13 76~+17 50、+12 24~+18 79、+14 39~+17 64、+12 50~+16 26、+10 66~+15 44 respectively. The depleted Hf isotope compositions of first group indicate that magmas are derived by partly melting of depleted mantle. At other hand, relatively homogeneous Hf isotope compositions also indicated that the first group magmatisms did not mixed with older continent crust, and are belong to island arc magmas. The initial value of ε Hf( t ) of second group Eocene biotite granodiorite are +5 75~+9 42, which are similar to the same period magma of south Gangdisi belt, which are derived by partly melting of juvenile lower continental crust.