Based on the above analysis, the most studies were actually focused on policy advice, mechanisms of action, behavioral analysis and microscopic factors. In contrast few studies were focused on macro factors of rural labor force. In this study, the State space model was used to investigate the macroscopic factors influencing rural labor employment, deeply analyzing the longevity, dynamic and interactivity of the development of the rural labor employment, which provides theories for the sound development of population and economics and offers governmental scientific planning and policy adjustment feasible suggestions. At the same time, this study also showed a realistic significance for the effective development of population urbanization.