In this paper,by analyzing the influencing factors of urban domestic water, according to the present situation of chengdu urban residents living water and take integrated urban population, per capita daily life water consumption, per capita disposable income, water price four representative scalar, through stationarity test and cointegration analysis, using cochran -orcutt iterative correction method to establish the regression model.The results showed that:① urban population increased by 1%, water demand will rise by 0.943%.②Prices rose 1%, residents' demand for water decreased by 0.016%, and resident income increase the same proportion, demand will rise 0.232%.③the growth of urban population to the life water consumption is the most significant effect, inhibition rate increases the demand pull function on the water demand more than the income is much smaller.This paper for effective management of urban residents living water, from a given ladder water price, strengthening propaganda, perfecting laws and regulations, Suggestions to promote water-saving technology and so on.