Combining with the current situation of Karamay City,building index system of economic growthand ecological environment,using normalization process for original datas,the weights were defined and thecomposite indexes were calculated.The results show that:correlation coefficient R was 0.732 1and the relationship between economic growth and ecological environment index was relatively close.The coupling coordination model analysis showed coordination degrees Ccentered its average value 0.974 2fluctuant and coupling coordination degree Ddisplayed rising trend.ΔDvalue had the fluctuations.The greatestΔDappearedin the 2004years(0.544 0),ring growth rate r was 13.01%;the smallestΔD appeared in the 2009years(0.002 9),ring growth rate r was 0.56%.But the growth rate of economic growth and ecological environment directly affected coordination and coupling coordination degree.To coordinate the relationship betweeneconomic growth and ecological environment,achieve both balanced development,is an important factor forthe sustainable development of economic growth and ecological environment in Karamay City.