Abstract: The paper studies application of geochemistry anomalies and the definition of lower threshold based on analyzing soil measurement data from 1∶10000 geochemical survey in Yueming Mountain region,west part of Liaoning province.Compared with calculation method of traditional,threshold obtained by fractal method is more practical.And mutifractal mode is better at showing anomalous distribution and enrichment trend than the former.Threshold obtained by fractal method which showing it’s more likely to discover Au or Mo miniature deposit within some part of study area,are pointing out further prospecting direction.The method is not only applicable to Au and Mo,but also has universal meaning for other geochemical elements or geological data.