ObjectiveTo understand the health self-assessment and related influencing factors in the migrant workers who received of physical examination in Shanghai， so as to provide reference for formulating health service policies for migrant workers.

MethodsTaking Shanghai "Intelligent Blue Collar" Health Science Popularization Service Station as the investigation site， 8，100 urban workers were surveyed by questionnaire. The questionnaire includes basic information， health self-assessment， basic medical insurance coverage and satisfaction， subjective well-being and so on.

ResultsThere were significant differences between migrant workers and local workers in health self-assessment， two-week disease prevalence rate， and chronic disease prevalence rate（χ²=32.981，P<0.05；χ²=4.554，P<0.05；χ²=86.695，P<0.05）. The differences between migrant workers and local workers were also significant in the basic medical insurance coverage rate and the level of satisfaction （χ²=221.592，P<0.05；χ²=30.950，P<0.05）. There was no significant difference in subjective well-being between these two groups（χ²=8.787，P>0.05）. The health self-assessment of older migrant workers was significantly better than that of new generation migrant workers（β=0.062，P<0.05）， and was significantly worse in female migrant workers than that in male migrant workers（β=-0.120，P<0.05）. The health self-assessment was significantly better in migrant workers with agricultural household registration than that in non-agricultural household registration（β=0.060，P<0.05）. The higher the satisfaction of basic medical insurance，the higher the subjective well-being and the better the health self-assessment（β=0.148，P<0.05；β=0.422，P<0.05）.

ConclusionThe health status of migrant workers in Shanghai who received physical examination is better than that of local workers， and the participation rate of basic medical insurance is lower than that of local workers. Age， gender and household registration are the important factors influencing the health self-assessment. Satisfaction with basic medical insurance level and subjective well-being is a significant factor to predict health self-assessment positively . We should further improve the fairness of medical insurance benefits for migrant workers， improve subjective well-being， and ensure the health fairness of the group.