A series of climate agreements have called for the use of financial instruments to tackle the challenges and provide assistance to developing countries affected by climate change. Multilateral Development Financial Institutions have become key players in climate finance，fostering an environment conducive to researching，developing，and applying climate response technologies. These institutions have been instrumental in driving global and regional cooperation in climate finance，ranging from fiscal strategies to technological solutions，aimed at achieving climate justice through investments in sustainable projects，innovative financing methods，and capacity-building initiatives. Faced with the challenges of sustainable financing，Multilateral Development Banks（MDBs）are crucial in the realm of climate finance based on their distinctive advantages. Urgent reforms are necessary to stimulate economic growth and sustainable development in low and middle-income countries. Looking ahead，MDBs are expected to expand their role in climate finance，innovate in financial instruments，improve data accessibility，and provide more support to developing countries.