Abstract: This paper discusses the process and mechanism about removing fluoride and radioactive elements in the drinking water source of the Luling Mine, Huaibei. The experiment results show that the fluoride and radioactive elements in water were effectively removed by the coagulation and flocculation sedimentation process with polymeric aluminum chloride (PAC) as the coagulator; the concentration of fluoride reduced from 1.85mg/L to 0.78mg/L, total alpha from 0.13 Bq/L to 0.03Bq/L and total beta from 0.26Bq/L to 0.18Bq/L under the condition of 20mg/L of PAC concentration.