Based on the monitoring data of China’s floating population in 2017,this paper uses the Heckman model and interactive model to study the income effect of the stability of the floating population’s employment.Research shows that after controlling the differences of personal characteristics,mobility characteristics,and employment characteristics,employment stability has a positive impact on the income.After further controlling the selective bias,the impact of employment on income remains significant.The income of people with stable employment is 20.2%higher than that of people with unstable employment.The labor market segmentation and push-pull froce of immigratory place and migratory place significantly affect the income effect of the stability of the floating population’s employment.