Firstly, the coupling degree between income distribution system and consumer demand system is calculated based on system theory and coupling theory, in order to analyze the matching degree between income distribution subsystem and consumption demand subsystem. Secondly, the regression analysis is carried out with the growth of consumer demand as the explained variable and the total coupling degree of income distribution and consumer demand as the explanatory variable, in order to explore whether the matching degree between income distribution and consumer demand subsystem promotes the growth of consumer demand and thus promotes economic growth.