中文摘要：

基于2010年东部六城市的农民工问卷调查，利用分位数回归方法对进城农民工的工作稳定性与收入变化之间关系进行实证分析。在控制其他重要变量之后，工作稳定性（即每份工作平均持续时间）对收入变化具有正向作用，但会经历一个二次增长的过程。对低收入与高收入者，随着工作稳定性的提高，每份工作时间的边际效益呈现递减趋势，适当更换工作有助于其提高收入。但对于数量最多的中间收入者而言，随着工作稳定性的提高，每份工作的边际收入递增。因此，该收入群体为增加其收入应减少流动，提高工作稳定性。通过提高劳动力市场信息的透明度、加强市场监管、改善工作环境、鼓励农民工创业等可以有效提高农民工就业的稳定性，从而有助于提高收入水平。

英文摘要：

The present authors use the rural workers＂ questionnaire data of six provinces in eastern China 2011 to make an analysis of the correlativity between rural workers＇ job stability and their change of income by Quantile Regression. It was found that, while controlling other central variables, their job stability has a positive impact on their income increase, presenting a quadratic growth curve. For rural workers with the lowest income or highest income, the marginal benefits of it decrease when job stability rises up. However, for those of the mid-shaft income, the marginal benefits of it increase when job stability rises up. Meanwhile, the theory of job matching is adequate for researching the issues of China＇s rural workers, who trend to change jobs with rationality and positivity. And the variables of gender, education time, region, and others have significant impact on the change of their income as well.