This paper studies the impact of political dynamics on corporate environmental investments. Employing data collected manually on the turnover of municipal government officials in China as a proxy for political dynamics from 2007 to 2020, we find that these dynamics drive an uptick in corporate green investments, aligning with the principles of resource dependency theory. The influence of political dynamics on green investments becomes more pronounced when companies grapple with external economic and political uncertainties. Additionally, this effect is most pronounced among energy sector companies and non-state-owned enterprises (SOEs). Despite the observed surge in green investment activity due to political dynamics, we reveal a tendency towards over-investment in green initiatives, subsequently diminishing overall firm investment efficiency under current political conditions. This study advances knowledge regarding how political dynamics influence enterprises' sustainability practices and provides valuable insights for businesses navigating the implications of their pursuit of environmentally responsible development.