The polymeric basic aluminum silicate-sulfate can be made from three substances, such as aluminum sulfate, sodium silicate and sodium aluminates. Adoption sort neote ric one synthesis,under high shear mixing condition to produce polymeric Aluminum Sulfate-silicate--inorganic macromolecule flocculants, that is liquid, PH is 3.0, molecular formula: AlA (OH) B (SO4) C (SiOx)Because inorganic macromolecule have capability of electricity neutralized, bigger molecular mass,strong capability of adsorption, and products are relative stabilize, more economical than organic macromolecule flocculants, innocuity and high effect compared with tradition flocculants.We can use the flocculants to make sewages purified .The sewages contain sulfur, oiliness, which are treated sewages of oil refining to organism treatment sump in parturition course of oil refining,and the sewages of dark and white in parturition course of paper mill. We study the properties of the flocculants, change of CODCr and effect of sewerage decolouring and so on.Thus fig. Can be seen to add the flocculants(0.1ml) to the sewages of the oil refining and the paper mill that effect is not distinctly. Yet increase of quantity to remove turbidity and floccules effect is distinctness. When the flocculants (0.5mi) be added to the dark sewage of, the penetrate light rate attain 90～98%, the sewage of the oil refining is about 90%, but when we make floccules experiment, the color of dark green and auras of the sewages of oil refining and the paper mill are all disappear, the PASS that add to the sewage will have certainly time to flocculate. When use pay attention to quantity and horary the connection.As a result in the sewages purified, those products form quickly, granule density is big, and subsided velocity is quickly, Floccules effect and capability of removing turbidity, removing CODCr are ascendancy than tradition flocculants - aluminates, and the remained aluminum of water treatment is little. It has preponderance property of sedimentation rapidity and purifying rate, and the capability be purified of flocculants is increase 50% than the AS. The flocculants uses little dosage in sewerage treatment. That has wide foreground of application, salience economy and society benefit, congruency extend and applied in sewerage Treatment field. The flocculants has predominant use property than the aluminum sulfate.