Abstract: The Mawu gold deposit is distributed in the east part of Minxian-Lixian metallo genic belt, which is 5~7 km from Zhongchuan rock mass. The Mawu gold deposit is a medium-sized micro disseminated type gold deposit that discovered in recent years. Fissure gold and package gold have been found during microscopy observing process of rock ore specimens. During the analyzing process, the existence of inclusions may be affected the accuracy of the test results. In this paper, the reliability of testing results has been tested and verified by selecting the reasonable sample preparation process, detection process, and analysis of internal and external inspection result.After comparing, the results show that the sample preparation process for Mawu mining area is reasonable, and the related detection results are accurate and reliable.