Located in Wangqing area of Jilin Province, the Jiapigou molybdenum deposit is one of the newly discovered porphyry deposits. The molybdenum ore bodies are hosted in the porphyraceous biotite monzogranite which is controlled by NE-trending faults. The results indicate that the Jipigou deposit was formed in early Jurassic period. In combination with the regional tectonic evolution, the authors have reached the conclusion that the Jipigou molybdenum deposit was formed under the setting of transition and superimposition of tectonic regime, and the rock-forming and ore-forming processes were widely influenced by the subduction of the Paleo-Pacific plate.