Mine wastewater forms when natural solvents dissolved in water, together with mineral water, mine dam overflow and slag yard leaching water in general. Typically, the mine wastewater pH value is between 7 to 8, poor alkaline. Sulfur mine wastewater is acidic, because SO2 dissolved to form acidic H2SO3. there are some sulfur mines in surrounding rocks and coals. These sulfur mines can be oxidized in air, producing acidic water, Especially in the mining tunnel, where there is large amount of infiltration groundwater and ventilation, the oxidation of sulphide minerals happens.