After analyzing the international and domestic market, the article analyzes the outer and inner marketing environment of Tianjin Ethylene Plant, including economic and competitive environment, and indicates the opportunities and challenges that Tianjin Ethylene Plant faces, based on SWOT analysis, and points that Tianjin Ethylene Plant must improve its enterprise core competence in order to win its survival and development.
（2）By analyzing the changing outer and inner marketing environment of Tianjin Ethylene Plant, the article diagnoses exactly the problems existing in Tianjin Ethylene Plant using SWOT analysis. This enriches the marketing strategy of Tianjin Ethylene Plant and makes the strategy more practicable and perfect.
（3）This article not only puts forward the marketing strategy that fits the actual situation of Tianjin Ethylene Plant, but also gives the effective measures to control the execution of the strategy. These measures will put the marketing management into effect and ensure reaching the marketing goals successfully.