Taking the coal gangue from Shandong Jining №3 coal mine as research object,a research about the differences of the leaching characteristics of heavy metal between dynamic leaching and static immersion was carried out.The result showed that: the concentration of heavy metals which were leached is affected by the background value of the heavy metals in the coal gangue.The higher the background value is,the larger the concentration will be(except Mn).Static immersion is not the limit of dynamic leaching,the damage to the environment that dynamic leaching made was larger than that of static immersion.According to the environmental quality standard of surface water,whether the dynamic leaching or the static immersion,only the concentrations of Cr and Pb were over the third level standard values.The pH of leaching water was beyond seven,but it wasn't over the third level standard values of national surface water.