Then adding the coagulant for treating the fluorine-containing waste water for coagulation treatment, the application process is simple, the investment cost is low, and the removal efficiency is high. The application process is as follows: firstly, the regulator lime milk is added into the fluorine-containing waste water so that the pH of the fluorine-containing waste water is between 6 and 9; the final concentration of the coagulant for treating fluorine-containing waste water in fluorine-containing waste water is 900 ~ 1500mg / L, low production cost. The coagulant for the fluorine-containing wastewater treatment according to the invention is cheap in raw materials The coagulant for the fluorine-containing wastewater treatment and the application process thereof Application No. / Patent No. 200910095979 The invention discloses a coagulant for the fluorine-containing wastewater treatment And its application process, the coagulant for treating fluorine-containing waste water is a complex coagulant obtained by adding a polymer organic additive during the synthesis of polyaluminum chloride; the high-molecular organic additive is Cationic polyacrylamide, the degree of amidation is 10-30% and the molecular weight is 500-800 million; the dosage of the high-molecular organic adjuvant is 1-10% of the mass of AlCl ↓ [3] 6H ↓ [2] O,