The employment of migrant workers is not only the core problem in the weak position of migrant workers，but also the core problem related to the realization of the new urbanization strategy. This paper makes use of the data of “National Survey of migrant Workers in 100 villages-Henan Province”，carried out jointly by Xi’an Jiaotong University “New urbanization and Sustainable Development Task Force” and the Sociology Department of the Grammar College of Henan Agricultural University，Henan Province，China. Based on the perspective of generation，migrant workers are divided into three generations，and the employment problems of migrant workers in Henan Province and their generational differences are analyzed respectively. It is found that economic factors are the main reasons to promote the employment of migrant workers. With the succession of generations，the survival economic motivation of migrant workers decreases. Weak，individual development type of non-economic motivation to strengthen，migrant workers have a strong tendency of irregular employment channels，social networks play a leading role，but the second，the third generation of migrant workers to their degree of dependence has weakened；There is obvious occupational segmentation in employment，most migrant workers are isolated in non-（low-end）technical and low-end service industries，with the change of generations，migrant workers have gradually got rid of the label of industrial workers to diversify into occupational types；Most migrant workers have the desire to return，the older they are，the easier to make the decision of return；the lower the overall income level of migrant workers，the second generation migrant workers have a comparative advantage in income；the signing of labor contracts The signing rate of the first generation of migrant workers is the lowest，the migrant workers generally have higher working intensity，and more than half of the first generation of migrant workers have even reached the full time of seven days. Migrant workers pay arrears or deduction is serious，this problem is particularly prominent in the first generation of migrant workers；The social insurance coverage of migrant workers is in a low level and the second generation of migrant workers have a comparative advantage in other social insurance except urban health insurance and commercial medical insurance.