推动农民向城市二三产业转移是缩小我国城乡差距的一项重要措施,但自2004年起,沿海地区的劳动密集型企业却普遍出现了招工、用工困难的现象,许多企业开工不足。这似乎与刘易斯模型的无限劳动供给相矛盾,本文结合中国的实际情况,修正了刘易斯模型中固定工资水平下的无限劳动供给,而认为劳动供给是有有限弹性的,由此得出了民工荒的背后的经济学原因,并在此基础上提出了一些政策建议。 Promoting the transfer of peasants to the secondary and tertiary industries in cities is an important measure to narrow the gap between urban and rural areas in our country. However, labor-intensive enterprises in the coastal areas have generally experienced recruitment difficulties and labor-intensive employment since 2004, and many enterprises are under-employed. This seems to contradict the unlimited labor supply of the Lewis model. In the light of the actual situation in China, this paper modifies the unlimited labor supply under the fixed wage level in the Lewis model and considers the labor supply as finite and flexible, The economic reasons behind, and on this basis put forward some policy recommendations.