This paper discusses the stability of the waste water system after SSBR plant at PetroChina Dushanzi Petrochemical Company by using DLVO theory. The fundamental reason for the operation problem is the damage to the stabilizing system and the system blockage resulted by the suspension of larger rubber materials agglomerated by oil and rubber particles in the oily water. In this paper, some short-term and long-term improvement measures are put forward such as setting up new waste water pre-treatment facility and revamping the primary waste water treatment unit after SSBR plant by using gas energy flocculation technology to remove all the rubber particles and surfactants in waste water.