Based on the strong poly role of phosphate on polymeric ferric sulfate (PFS), with PFS and Na 2HPO 4 as raw materials, a new type of composite flocculant polymeric phosphate ferric sulfate (PPFS) was developed. The structure of PPFS was characterized by IR and SEM, and the mechanism of flocculation was analyzed. The factors affecting phthalic acid esters (PAEs) removal were discussed, including dosage, nPO 43-/nFe3+and alkalization degree. The results indicate that PPFS has good removal effect to PAEs. When the dosage is 70 mg·L-1, nPO 43-/nFe3+ is 0.3 and alkalization degree is 30%, the removal rate of dimethyl phthalate, diethyl phthalate, dibutyl phthalate and bis (2 ethylhexyl) phthalate are 67.93%,84.55%,90.88%,88.69%, respectively.