To study how to enhance the happiness of flexible employment personnel，based on data from the China Comprehensive Social Survey 2018 and 2021, mlogit regression analysis was used. It was found that the higher the sense of social class identity，the higher the subjective happiness of flexible employment personnel. Using the logit model and Heckman two-step method，it was found that social pension，commercial medical and pension insurance play the mediating role between class identity and the happiness of flexible employment personnel，while the mediating effect of social medical insurance is not significant. Furthermore, it was found that compared to 2018，class identity not only promoted participation in commercial insurance，also promoted participation in social pension insurance，but its promoting effect on happiness decreased in 2021. In addition，career types can also have an impact on class identity and participation in different insurance products. The various indicators of labor dispatch workers are relatively low，which requires special attention.