Abstract: With the rapid development of coal mining industry and the continuous accumulation of coal gangue，the pollution of acidic wastewater from coal gangue has been paid extensively attention to scholar at home and abroad.The acidic wastewater from coal gangue was characterized with higher acid and heavy metal.In this paper，the environmental hazard and the characteristic of acidic wastewater from coal gangue were introduced，the principles，advantages and disadvantages，and current development statues of acidic wastewater treatment method were summarized.The focus was on the discussion of the technical bottlenecks for each method.Some key parameters were provided for the selection，application，research and development of acidic wastewater treatment technology.Finally，it proposes that the hybrid of processing technology，control of source oxidation and resource utilization of coal gangue will be the major development direction of solving the problem of acidic wastewater pollution from coal gangue.