The job stress is considered as an important factor to affect the employee's commitment which closely links to their behavior. Intensive work，to some extent，affects the organizational commitment to employees, thereby affecting the organizational effectiveness. The modern organization should make clear the sources of stress and their impact on organizational commitment so as to adopt the targeted strategy to reduce the level of job stress. From this starting point，explores the correlation between job stress and organizational commitment by an empirical study on the employees in private enterprises. Based on research findings，puts forward the corresponding recommendations on stress management.