The Riabuxi copper-polymetallic deposit in Coqen County, Tibet, is located in the northern margin of the Gangdise porphyry-type copper metallogenetic belt. The host rock is the late Himalayan granitic-porphyries which are wholly mineralized. The copper-polymetallic deposit is occurred at the contact zones of the porphyries and structural altered rocks. The study reveals that the ore-bearing porphyries exposed at the surface are only apophyses and dikes, intense erosion did not take place, indicating a benefit potential for discovering deep-seated porphyry deposits. Verified by deep drilling and surface trenching, it is found that the variation coefficients of grades and thicknesses along strikes and dips of ore bodies are small and associated component contents are relatively great.