The poly aluminum chloride(PAC),aluminum sulfate(Al₂(SO₄)3.18H₂O),ferrous sulfate(FeSO₄.7H₂O) and ferric chloride(FeCl₃.6H₂O) were chosen as coagulants,the phosphorus removal effect for municipal wastewater by beaker test were carried out.The removal of suspended solids(SS) and chemical oxygen demand(COD_Cr) were also compared.The results show that,when the dosage was 80mg/L,the removal of TP by four kinds of coagulants from high to low was FeCl₃.6H₂O>Al₂(SO₄)3.18H₂O>FeSO₄.7H₂O>PAC;the removal of TP,SS and COD_Cr were increased with coagulant dosage.