A series of dibasic tertiary amines and dihalides have been used as raw materials for the synthesis of polyquaternary ammonium salts, a type of cationic polyelectrolytes usually known as ionic polymer, Which can be used as flocculating agents. From the results of the experiments, the condensation polymerisation reactions, taking place with different raw materials, are discussed. The factors influencing the formation, the structure and the molecular weight of the condensation polymers have been investigated.The characteristics of these ionic polymers were studied by determination of their flocculating effect. The influences upon flocculating effect by the presence of acid, base or other electrolytes in the water solution to be treated were also investigated. The variation of zeta potential of the colloid particles was measured and discussed.The experimental results indicated that the ability of these ionic polymers neutralizing the charges on the suspended particles is one of their important properties as flocculating agent. Like other macromolecular flocculants, there is also bridging of suspended charged particles under the action of these ionic polymers. Therefore, the molecular weight of them has some influence upon their effectiveness as flocculants. In neutral or weakly basic solutions and in solutions with other electrolytes in low concentrations, these ionic polymers give comparatively good results in water purification. So it is possible that they would be used as industrially applicable polycationie organic flocculants.