Green Finance, alternatively Sustainable Finance, is one of the fastest growing economic sectors in the world now a day. This paper provides an outline of green financing status of Bangladesh, endows with a portrayal on the different sources of green finance available in Bangladesh, provides an insight into the green finance landscape in the country in general and represents the challenges and prospective for greening growth of Bangladesh towards achieving SDG14. Greening the economy involves improving environmental quality and combating climate change which poses political, economic and financial challenges. Major challenges are about financing climate protection and climate change adaptation and how we can fill the funding gap. The goal of SDG 14 is to prevent and reduce ocean pollution, promote sustainable management and protection of marine and coastal ecosystems. Green finance faces many challenges as such in achieving SDGs created a huge financial gap in Bangladesh. This requires the mobilization and use of a variety of financial sources, including domestic revenue, development assistance, private sector investment, and public-private partnerships. The global economic downturn, violent conflict in some countries, biodiversity loss, water, dry land, forest degradation, and climate change pose challenges to peace and prosperity. Due to lack of capacities of banks and financial institutions, the lack of a proper understanding of the risks and returns of green projects, and the underdeveloped equity and bond markets decelerating the expected growth of green projects in Bangladesh. Lack of coordination among the respective agencies, poor financial governance, and the absence of a national policy oversight body and mainstreaming green finance toward SDG14 are some of the key policy issues that Bangladesh needs to address and to promote green financing to achieve sustainable development goals (i.e. SDG14) for reinstallation of coastal and marine ecosystem.