Abstract: Based on the DPSIRM causal framework model, the water environment governance performance evaluation system was constructed. Using the entropy weight method, and combined with the linear weighting method and obstacle degree model, the comprehensive index of water environment governance performance in the Yangtze River Economic Belt from 2010 to 2019 was comprehensively evaluated and the main obstacle factors were identified. The results showed that, on the whole, the comprehensive index of water environment governance performance in the Yangtze River Economic Belt was rising rapidly. From the perspective of space, the overall water environment governance performance in the upstream and downstream regions was better, while the middle reaches were the worst and fluctuate greatly. The development trend of the performance index of each subsystem was different obviously, but all of them showed the trend of fluctuation and rise. From the comprehensive analysis of the main obstacle factors, the amount of fertilizer applied per unit cultivated land area, the growth rate of per capita disposable income of urban residents, the COD emission of ten thousand yuan industrial output value, the ammonia nitrogen emission from ten thousands yuan industrial production value and treatment capacity of industrial wastewater treatment facilities were the main obstacles which hindered the improvement of the water environment governance performance.

Key words: DPSIRM model, water environmental governance performance, obstacle factor, Yangtze River Economic Belt