Abstract: The peasant-worker group is an important part of the labor market,and their employment status also relates to the social harmony and development.By sampling survey and taking Beijing's peasant-workers as the object of the study,the paper constructs the job satisfaction index,and analyses the influence of the background information,the working condition,the income condition and subjective feeling on the job satisfaction.The multiple regression models reveals how the factors affects the job satisfaction interactively,it especially reveals that income increase and fairness are the important means to improve the job satisfaction.