Objective To study the relationship between occupational stress/sleep quality and job satisfaction of internet enterprise programmers， to explore the mediating effect of sleep quality between occupational stress and job satisfaction， and to provide a theoretical basis for taking effective measures to improve job satisfaction.

Methods A total of 271 programmers from an Internet company in Shanghai were investigated by job content questionnaire， Pittsburgh Sleep Index Scale and the third part of the McLean occupational stress questionnaire. The results were statistically analyzed

Results The positive rate of occupational stress of programmers in this enterprise was 66.7%， 34.3% of them had average sleep quality， 28.0% had poor sleep quality， and the score of job satisfaction was 47.70±6.78. Correlation analysis showed that the higher the occupational stress， the worse the sleep quality and the lower the job satisfaction. Effects of occupational stress and sleep quality on job satisfaction were both statistically significant. The total effect of occupational stress on job satisfaction was -0.35， and the mediating effect of sleep quality between occupational stress and job satisfaction was -0.04， accounting for 12.0% of the total effect.

Conclusion Sleep quality of internet enterprise programmers plays a partial mediating role between occupational stress and job satisfaction， and a series of measures such as improving sleep can be taken to improve programmer’s job satisfaction.