Abstract: The stable employment of more than 200 million migrant workers is the basis for sustainable and stable development of China's urbanization. Based on the survey data collected from Nanjing city, this paper conducts an empirical analysis on the employment stability of migrant workers and explores its influencing factors of the employment stability by using the multivariate linear regression model and ordinal Logistic model. Results show that for male migrants, aged from 20 to 40 years old, with junior high school education or above, have low employment stability. Migrant workers in building decoration industry, wholesale trade, retail and manufacturing industries have higher employment stability than other ownership units. For those who are in private enterprises have significantly lower employment stability. While migrant workers who have participated in social insurance offered by employers possess higher employment stability. In addition, the employment stability of category differences of migrant workers is influenced by three factors: age, education and occupational skill level. Specifically, age and education have a stronger impact than occupational skill level on employment stability. Therefore it’s suggested to raise employment stability of migrant workers by improving human capital quality and job selecting skills.