The Gangdese belt is the giant Cu belt in the Tibet Plateau during the subduction in the Mid-Jurassic, collision in the Eocene, and post-collision in the Miocene, respectively. Based on many detail field surveys and comprehensive studies, the authors concluded that the host intrusive is not the classical single porphyry but the composite small porphyry emplaced in multi-stages during the similar time. Then, the authors presented a new metallogenic model that more emplacement times of composite small porphyry and more complexity of lithology and mineralized elements in the same geological setting are more suitable for the formation of large and super large deposits. This new model not only extends and supplements the classical porphyry Cu model but also has important guiding and reference meanings in the work plan for exploration and evaluation and in the prospecting breakthrough in the Gangdese Cu belt.