Based on the day-night PM_2.5 difference of the nearest atmospheric monitoring points to measure whether there is illegal emission, this paper explores the impact of environmental protection officials' tenure (EPLT) on illegal emissions. The results show that there is a positive correlation between EPLT and illegal emissions. Stable EPLT can reduce illegal emissions by increasing environmental information disclosure and environmental subsidies. It can increase illegal emissions by weakening public pollution reporting and media supervision, environmental law enforcement and promoting corruption. In addition, EPLT can increase illegal emissions as EPLT is less than 3.55 years, while EPLT can increase illegal emissions as EPLT exceeds 6.21 years. Further, when mayor's tenure and EPLT are both stable, the promotion effect of EPLT on illegal emission is stronger. Stable company director's tenure can also aggravate the promotion effect of EPLT on illegal emissions.

本文基于最近大气监测点的昼夜PM _2.5差异来衡量是否存在违规排放，探讨了环保官员任期（EPLT）对违规排放的影响。结果表明，EPLT与非法排放之间存在正相关关系。稳定的 EPLT 可以通过增加环境信息公开和环境补贴来减少非法排放。它可以通过削弱公共污染报告和媒体监督、环境执法和促进腐败来增加非法排放。此外，EPLT会增加非法排放，因为 EPLT 少于 3.55 年，而EPLT由于 EPLT 超过 6.21 年，可能会增加非法排放。此外，当市长任期和EPLT都稳定时，EPLT对非法排放的促进作用更强。稳定的公司董事任期还可以加剧EPLT对非法排放的促进作用。