Abstract: Arsenic is carcinogenic and teratogenic and toxic elements and the arsenic pollution exists generally in the metal sulfide mining.When the physical-chemical environment being changed，the different morphology and valence state of arsenic also can be transformed,and it can gather in soil and water and lead to arsenic pollution .The common arsenide arsenopyrite can generate scorodite in the effect of oxygen and water.Under acidic conditions hydrolyze into arsenic acid, thus it can leaching and migration by wastewater.According to mechanism of arsenic contamination, demonstration that from mine tailings and source control and prevention of arsenic pollution and the importance of feasibility.In the arsenic pollution prevention and control, new mine tailings under water storage, acid neutralization and surface sealing technology, existing pollution tailings permeable reactive barrier technology and bioremediation technology, they are more mature, practical arsenic pollution control technology.

Key words: Sulphide tailings, Arsenic pollution, Chemical form, Migrating and transforming, Prevention and treatment