Since the world urgently requires action on climate change, countries are trying out new ways to lower their carbon emissions. Since China is among the biggest emitters, it has started carbon border measures to limit environmental problems during trade. But these policies cause major concerns about their agreeability with international trade rules, especially under World Trade Organization (WTO) guidelines. This work looks at how green trade and international trade law combine and how China’s use of carbon border measures matches or differs from World Trade Organization rules on fairness, how countries treat outsiders and barriers to foreign trade. This study investigates how the rules and market disputes involved with trade might bring both issues and benefits to the promotion of sustainable trade across countries. When international efforts to address climate change rise, it is crucial to know about this dynamic to guide both trade and the environment.