Abstract: Under condition of NaOH dosage of 83 mg/L，PAC of 75 mg/L，PAM of 4.2 mg/L，the high concentration SS（300~500 mg/L）mine drainage was treated by the integrated reactor with coagulation-sedimentation and sand filter.After treatment， the effluent quality can reach the first criteria specified in Integrated Wastewater Discharge Standard（GB 8978-1996）.The process has its competitive advantages in treating the coal mine drainage as low investment，low operating costs，less floor area and easy management.