Tieshanlong tungsten ore field is located in the eastern section of Nanling W—Sn—polymetallic metallogenic belt, which have produced more than 100 kt of wolframite around the Tieshanlong granitic complex. There have three kinds of granites: the early coarse- grained porphyritic biotite granite, the complement fine grained muscovite granite and latest granite porphyry veins, showing common geochemical characteristics of peraluminous, high- K and calc- alkali category, integrated with enrichments of SiO2, Al2O3, K2O, W, Sn, Cu, Mo, depletions of Ba, Sr, Ti, P, REE and Eu negative anomaly. The REE distribution curve shows a typical “seagull” distribution with M- type tetrad effect. LA- ICP- MS zircon U- Pb dating of granite porphyry yields emplacement age of 146.7±0.5 Ma (MSDW=0.5), with n(176Lu)/n(177Hf) and fLu/Hf rations of 0.000 973～0.001 989 and -0.97～-0.94, respectively. The εHf(t) values range from -17.9 to -10.3, and TDM2 are 1.86 Ga to 2.33 Ga, indicating primary reworking of the Paleoproterozoic crustal material. The comprehensive analysis shows that Tieshanlong ore field have three stages magmatic activities of 170～155 Ma, 155～150 Ma and 150～145 Ma, and the W—Sn mineralization is mainly occurred in the second stage. Granite porphyry is rich in Cu, Mo and W, which is closely related to the Cu—W—polymetallic mineralization, and show a great prospecting potential in the deep part of Tongling deposit.