With the development of social economy and the improvement of people's material living standard, more and more people begin to pursue the fun in work. The slogans of "happy work" have been sounded one after another, and workplace fun is attracting more and more attention from enterprises and academia. Based on the affective events theory, this paper focuses on the impact of workplace fun on employee silence, another common but easily overlooked behavior in the organization. Starting from the psychological path, this paper explores the mediating variable of workplace loneliness. The empirical study shows that: workplace fun has a significant negative impact on employee silence, and workplace loneliness plays a significant mediating role between workplace fun and employee silence. The purpose of this study is to provide practical management enlightenment for the implementation of workplace fun, the treatment of workplace loneliness and the alleviation of employee silence.