Abstract:Accompanying with the improvement of living standards, people are more and more fond of drinking natural mineral water containing a variety of trace elements, but the changes in the quality of mineral water make the scientific setting of mineral water well sanitary protection areas essential. Taking a certain natural mineral water in Ji'nan as an example, on the basis of surveying, by using the rose pattern fissure method, "to the source" of the protection zone has been set. It has solved the limitations and deficiencies of the original mineral water in a certain extent. Thus, well sanitation protection countermeasures can be carried out and accurate protection can be achieved.