Green development cooperation is an integral part of China-ASEAN cooperation on building high-quality Belt and Road. China and ASEAN have strong momentum in green development cooperation，in order to jointly address global climate change，promote sustainable development of domestic society and economy，and counter the stigmatization of the Belt and Road by Western societies. At present，green mechanism construction has gone to deeper levels；clean energy cooperation is on the ascendant；and green industrial park cooperation is flourishing. While reaping fruitful results，the green development cooperation between the two sides is also facing challenges such as insufficient capacity building of local governments，low-level engagement of small and medium-sized enterprises，interference from the COVID-19 epidemic，and competition from large countries outside the region，which need to be properly addressed. In the future，in the post-epidemic era，the two sides will focus on green financial cooperation and actively build green and digital Silk Road to inject new impetus into regional economic recovery and green transition.