This paper evaluated the environmental performance from 2013 to 2018 based on establishing environmental performance assessment system of Chengdu and the correlation of environmental performance increasing rate and GDP increasing rate was analyzed. In addition, Pearson’s correlation analysis on environmental performance index and GDP was carried out by using SPSS and we can see from the results that environmental performance shows an increasing tendency with the growth of GDP, environmental performance increasing rate is lower than GDP increasing rate. And there was no obvious correlation between environmental performance index and GDP (some high economical areas have low environmental performance levels). In another word, the rapid development of the economy does little help to rapidly improve environmental performance level. So Chengdu should pay more attention to protect environment, and be a coordinated development relationship between economy and environment.