Class Identification and peasant workers' sense of happiness are hot topics in academic circles, but the two variables are rarely seen to be correlated in researches. The multivariate regression model based on CGSS (2013) data confirms that, with the support of economic status improvement, spouse companionship, physical and mental health, and close connection with friends and relatives, the higher the young peasant workers' class identification, the stronger their sense of happiness. Through respective gender and regional sub-model robust tests, it is confirmed that, for influencing factors on sense of happiness, there are bigger differences between sexes and between regions of the East, Middle and West. After material satisfaction, young migrant workers are in urgent need of urban acceptance and respect, and local governments should take effective measures to enhance their class identification.