Based on the analysis of the characteristics, classification, and current situation of the “evironmental steward” service model, this paper analyzes the legal obstacles that restrict the promotion and application development of the “environmental steward”model, which is mainly based on industrial parks; it is suggested to further clarify the administrative and civil responsibilities of third-party environmental protection service enterprises, improve the relevant supporting systems in the legal framework of environmental protection, establish reasonable entry and exit mechanisms, innovate regulatory methods and supervision channels, and improve financial and tax support and financial financing mechanisms, so as to promote the comprehensive implementation and healthy development of the “environmental stewardship” service model in China, fully play its role in pollution control, and provide institutional guarantees for China’s ecological civilization construction.