Based on the theory of production function, the contribution rate of the residents’ consumption variables on shortterm economic growth is studied. According to the panel data of 1999—2008 in the West, the following point fixed effects model is set up on terms of time as influencing factor to research the promotion of economic growth by the residents’ consumption in western China. The results show that the influence of residents’ consumption on economic growth is increasing return of scale, and the contribution rate of residents’ consumption to economic growth presents a gradually increasing trend.