Abstract:Geothermal resource in Luxi plain is very rich. It belongs to medium and low temperature type. It buried and distributed widely, the temperature is moderate and mining potentiality is large. Through constrast and analysis on hydrochemical characteristics of geothermal water, cold water and sea water, the forming of geothermal water and its hydrochemical characteristics are studied. According to hydrochemical characteristics of geothermal water, geothermal water is developed and used properly.