After the reform and opening up, China's economy continued to grow rapidly for many years, and successfully achieved the first centenary goal of building a moderately prosperous society in all respects. In order to achieve the goal of sustainable development, China has put forward the strategic goal of carbon peak and carbon neutrality, which has strengthened the determination of our economy to take the road of green and sustainable development. The development of green economy cannot be separated from the support of green finance. Green credit is the core of green credit business, which is an important measure to achieve sustainable social development and financial support for the real economy. This paper takes Industrial and Commercial Bank of China as the research object, deeply analyzes the development status, advantages and existing problems of its green credit business, and further puts forward corresponding countermeasures. Finally, the paper summarizes the enlightenment from the development of Industrial and Commercial Bank of China's green credit business, and provides some references for further research in the future.