Abstract: Based on the distribution of mineral resources and geological background in central Tibet area，eight evaluation areas are divided.With copper mine as the research object，five A-level indicators，and 12 B-level indicators are constructed.The entropy method is adopted to determine the index weight objectively，and the final complex value was obtained by multiplying the index weight and the index data.According to the assessment scores of each district，the security level of copper resources in the central region of Tibet is analyzed.The conclusions are as follows: copper minerals at Gangdisi-Nianqing Tanggula copper ore belt has a better security level，and copper mineralization at north and south sides of the copper belt is relatively weak; copper minerals in central region of Tibet are distributed into two centers，that is，Xietongmon County and Lhasa City as the center spreading to the surrounding area respectively.The research results can be promoted and applied into the security level study of mineral resources in other areas. Geological survey|Mineral resources|Security|Entropy value method