Abstract: In recent years, the effect ofcorporate governanceof state-owned enterprises participated by Party committees has become the focus of academic circles. In the context of thegreen transformation implemented by enterprises, which is promoted vigorously by the state, this paper constructsthe quantitative evaluation indexfor the Party committee participation in corporate governance of SOEs with a total of 32 secondary indicators from four dimensions in accordance with The Regulations on the Work of CPC Grassroots Organizations in State-Owned Enterprises (Trial), and with reference to the policies and regulations related to the Party committee participation in corporate governance of SOEs. Taking the heavily polluting state controlled companies listed in A-share market from 2013 to 2020 as samples, this paper studies the impact of the Party committee participation in corporate governance on the fulfillment of SOEs' environmental responsibilities. The empirical results show that the Party committee participation in corporate governance can effectively promote the environmental protection investment of SOEs. At the same time, with the implementation of the“mixed ownership reform”in SOEs, the Party committee participation in corporate governance can effectively reduce the adverse impacts on the environmental protection investment of SOEs in the process of the“mixed ownership reform”.

Key words: Party committee of state-owned enterprise, environmental protection, mixed ownership reform, corporate governance