sulphonated fatty acid salt surfactants were prepared from the biodiesel production of illegal cooking oil by oxidation-reaction method. The optimal synthetic conditions were system introduced. Their flotation process performance for pure minerals and fluorite ore were studied.The result showed that the recovery of fluorite rise significantly with increase of pulp pH, when the pH is 9.06 and the collector density is 80mg/L, the recovery of fluorite is 97.13%.The results of bench scale -flotation indicated that by using sulfonated fatty acid salts as collector,the recovery of fluorite can reach to 98.01%,which is 1.21% higher than conventional collector oleic acid.