NOVELTY - The method comprises conveying a fluoride-contained tail gas generated in production of calcium superphosphate to a first absorbing tower via a pipeline, absorbing the waste tail gas using ammonium fluoride solution (18-22%) and then delivering the tail gas to a second absorbing tower, absorbing the waste tail gas once using the ammonium fluoride solution and then forming the former two sections of ammonium fluoride absorbing procedure, and conveying the fluoride-contained tail gas absorbed by the second absorbing tower incompletely or the volatilized ammonium fluoride.    USE - The new method is useful for processing fluoride-contained tail gas in production of calcium superphosphate.    ADVANTAGE - The method is capable of efficiently and eco-friendly processing the tail gas thus rapidly and economically and safely producing the calcium superphosphate with high purity and without special storage requirement.    DETAILED DESCRIPTION - The method comprises conveying a fluoride-contained tail gas generated in production of calcium phosphate to a first absorbing tower via a pipeline, absorbing the waste tail gas using ammonium fluoride solution (18-22%) and then delivering the tail gas to a second absorbing tower, absorbing the waste tail gas once using the ammonium fluoride solution and then forming the former two sections of ammonium fluoride absorbing procedure, conveying the fluoride-contained tail gas absorbed by the second absorbing tower incompletely or the volatilized ammonium fluoride and ammonium fluorosilicate fluid foam to the third absorbing tower via the pipeline, absorbing the tail gas once using water as the absorbing fluid and then forming the third absorbing treatment technique, and respectively putting the ammonium fluoride solution in the first absorbing tower and the second absorbing tower. The first section ammonium fluoride absorbing procedure comprises: inputting the waste gas containing silicon tetrafluoride escaped from the producing process of the calcium superphosphate to the first absorbing tower; adding an ammonium fluorosilicate absorbing fluid in the mixed solution after obtaining the ammonium fluoride in the second absorbing tower; controlling the temperature in the first absorbing tower at 60-80 degrees C where the ammonium fluoride and the silicon tetrafluoride gas are reacted to generate ammonium fluorosilicate when the pH value of the solution in the first absorbing tower is 3-3.5; discharging the ammonium fluorosilicate solution to a cooling and crystallizing tank from a bottom part of the first absorbing tower; ceaselessly mixing the ammonium fluorosilicate solution in the crystallizing tank; and naturally cooling the ammonium fluorosilicate solution to the room temperature to obtain the ammonium fluorosilicate crystallization.    DESCRIPTION OF DRAWING(S) - The figure shows a flow diagram of a method for processing fluoride-contained tail gas (Drawing includes non-English language text).