本文首先对泰尔指数进行了分解,继而测算了1978年～2012年城乡收入差距,再通过与居民消费率建立反馈协整模型,运用动态最小二乘法(DOLS)估计模型消除其内生性,实证表明城乡收入差距是引致居民消费需求乏力的主要因素,最后提出了缩小城乡收入差距的政策建议。 This paper first decomposes Theil index, and then calculates the income gap between urban and rural areas from 1978 to 2012. Then it builds a feedback co-integration model with resident consumption rate, and uses dynamic least squares (DOLS) estimation model to eliminate its endogeneity. Empirical It shows that the income gap between urban and rural areas is the main factor leading to the weak consumer demand, and finally puts forward the policy suggestions to narrow the income gap between urban and rural areas.