有效需求不足是当前我国经济生活中一个突出的矛盾,这个矛盾不解决,将直接影响到我国的经济发展。为此，国家早就提出了扩大内需的决策，但至今见效甚微，原因何在？如何才能进一步解决需求不足？本文从三个方面既分析了需求不足的原因、关键，又提出了比较切合实际的扩大内需及解决有效需求不足矛盾的见解。 Insufficient effective demand is a prominent contradiction in the current economic life of our country. If this contradiction is not resolved, it will directly affect our country’s economic development. To this end, the state has long put forward the decision to expand domestic demand. However, little has been done so far. What are the reasons? How to further solve the lack of demand? This article analyzes the reasons for the lack of demand from the following three aspects: the key point, and puts forward the more realistic opinions on expanding domestic demand and solving the contradiction between the effective demand and the insufficient demand.