The concepts of personal-organization fit, organizational citizenship behavior (OCB) and contextual performance were analyzed. Taken enterprises in Nanjing as an example, the impact of individual-organization fit on the organizational citizenship behavior and the contextual relationship was studied empirically, and the absolutely intermediary role of OCB between the personal-organization fit and staff contextual performance was verified. The results show that the organization should strengthen the values of acceptance which is raising the personalorganizational values fit in the process of the values socialized; while the staff themselves should strengthen the understand of organization values and seek the better personal fit organization in the selection of work, which will help the performance of employees in the workplace, improve the performance of individuals, and ultimately improve the organizational performance.