Five coins from the collection of the Tibetan Autonomous Prefecture Museum in Yunan Province, Shangri-La Diqing county, were analyzed by metallurgical microscopy observations and scanning electron microscopy. The results suggest that these five coins could be categorized into two groups: Copper and Ag-Cu alloy. Copper coins have a copper content up to 99%, and can be considered pure copper products; the Ag-Cu alloy coins have similar composition as those at the same period. The five coins were produced by mechanical stamping, coinciding with the technological developments of the time. The result is useful for research on the manufacturing technique of coins in the Tibetan area.