The green environmental protection industry has the dual attributes of driving economic growth and coping with environmental problems. The deep integration of “four chains” (i.e., innovation, industrial, capital, and talent chains) is crucial for the high-quality development of the green environmental protection industry and the achievement of the carbon peaking and carbon neutrality goals. Considering the development status of the green environmental protection industry, this study analyzes the characteristics of four-chain integration at different stages of enterprise development. In the early stage of establishment, the capital chain is key to enterprises and an industrial chain is gradually formed driven by the innovation and talent chains. During business expansion of enterprises, the industrial chain is extended, driven by the capital chain and supported by the innovation and talent chains. At the mature stage, enterprises can carry out strategic layout based on the industrial chain while maintaining the innovation chain. However, the four-chain integration in the green environmental protection industry of China still face several problems, including weak connection between the innovation and industrial chains, weak support of the capital chain to other chains, insufficient integration between the talent chain and the innovation and capital chains. To address this, we propose the following suggestions: (1) developing a low-carbon innovation strategy roadmap to clarify the development paths for four-chain integration; (2) improving the compatibility between the innovation and industrial chains; (3) optimizing the capital chain to improve its integration with other chains; (4) improving the talent chain; and (5) clarifying the driving chains according to the development stages of enterprises to ensure the effective integration of the “four chains”.