Amidst the backdrop of globalization, the international community has increasingly focused on green economy policies, recognizing them as crucial instruments for advancing sustainable development. With the green and low-carbon transformation of the global industrial chain supply chain, the green economy and trade have become an important symbol for measuring the trade competitiveness of a country or region. Green economy policies are not only related to the process of global environmental governance but also have a direct impact on the green transformation of countries’ economic landscapes and the reshaping of international competitiveness. Amid escalating environmental challenges, the concern over leveraging green economic policies to foster harmonious economic and environmental development has emerged as a significant matter for governmental and international entities. This paper will focus on analyzing the relevant theories of the green economy, the status of its development, and the challenges it is currently facing. By analyzing the different cases of developed and developing countries in promoting the development of a green economy, we will take an in-depth look at the bottlenecks in the development of a green economy and the prospects for its future development, and reveal the specific challenges faced by different countries, as well as the innovative strategies they have adopted in promoting environmental sustainability and economic growth.