Abstract: The cause of formation of Jinshan mountain Great Wall mineral water deposit in various aspects, such as geological condition, hydrogeological condition, chemical composition of the mineral water was studied. The isotopes of hydrogen and oxygen (H², O¹⁸, H³) content in the mineral water revealed the source, age, elevation and position of recharge water of the mineral water deposit. The main chemical composition of the mineral water verified the geological structure of groundwater storage and the condition of deep water cycle.