Abstract: Excessive mining development led to serious heavy metal pollution in the mining area and surrounding regions. Based on introducing the environmental quality pre-warning, this article designs the basic methods of mine environment monitoring and pre -warning. Using the heavy metals content as the evaluation index, this article forecasts the changing trend, speed of heavy metals. The representative samples of Dongxiang Copper Mine are analyzed. The results show that the pollution source No. 1, No. 2 and tailings are serious polluted. From the perspective of heavy metals pollution comprehensive index, heavy metal pollution levels have been higher than the alarming line from 2003 to 2008 in Dongxiang copper mine. From the perspective of heavy metals pollution single factor index , Cu, Pb and Cd pollutions are relatively serious, followed by Zn, Ni.