This study attempts to analyse the correlation between the perception of emotional blackmail and the tendency to withdraw from the online community, using the psychological stress of the online communities as a moderator and mediator to further analyse the interaction between the three variables. A total of 483 valid questionnaires from internet community members were collected. Besides, the scale items for the three variables were developed. SPSS 20.0 and PROCESS were used for statistical analysis to test all the hypotheses. The findings showed that the perception of emotional blackmail and the psychological stress have a partially significant positive correlation with the tendency to withdraw from the communities. Moreover, psychological stress has a mediating effect but no moderating effect on the perception of emotional blackmail and the tendency to withdraw from the communities. The findings can guide online community operators in understanding user needs for sustainable community development.