The Changshanhao gold deposit is super large gold deposit found in the western part of Inner Mongolia in recent years. The paper has systematically studied the chronology of granitoid intrusions with LA-ICP-MS. Based on the zircon LA-ICP-MS U-Pb age data and combined with other geological evidences, it has been suggested that the granite porphyry, the monzonitic granite porphyry and their related gold deposit were formed in the early period of Early Permian, and which suffered the superposition of the tectonic-magmatic activity between the late period of Early Permian and the early period of Middle Permian. The results show that the Changshanhao gold deposit is a product of Hercynian tectonic-magmatic and fluid-related activities,  and belongs to mesothermal vein-type gold deposit related to intrusive rocks.