The Fe, Cu, S and Au deposits distributed all over the Tongling area are considered to be closely related to the large scale magmatic activities that occurred in Mesozoic, in which the late Jurrasic high K calc-alkalic intrusions formed in 140~150 Ma are the main ore-forming plutons. The authors selected the dioritic porphyrite related to the Jiaochong Au-S deposit to conduct LA-ICP-MS zircon U-Pb dating of the pluton, and yielded an age of minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">(128.0minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">±2.2minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">) Ma. It is suggested that, in addition to the late Jurrasic high K calc-alkalic intrusions related to large scale mineralization, there also existed early Cretaceous magmatism in the Tongling area, which corresponded to Au-S mineralization. Four middle and late Carboniferous concordant ages of magmatic zircons minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">(309~328 Maminor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">) indicate that there possibly existed Hercynian magmatism, whose scale, setting and relationship with mineralization, however need further investigation. The other two groups of concordant ages for old inherited cores of magmatic origin minor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">(1870~1931 Ma and 600~808 Maminor-latin; mso-fareast-font-family: 宋体; mso-fareast-theme-font: minor-fareast; mso-hansi-font-family: calibri; mso-hansi-theme-font: minor-latin">) suggest Paleo-and Neo-proterozoic magmatism in the Tongling area.