Green finance is becoming increasingly important as global warming, climate change, and environmental concerns grow. In order to address this issue, trying to incorporate blockchain technology really does have the potential to transform how sustainable projects are funded and environmental risks are managed. This study proposes a model for implementing blockchain technology in green finance. The model proposed the creation of transparent supply chain management, a peer-to-peer renewable energy trading platform, a platform for issuing and trading green bonds, and a system for managing climate risk. The model promotes the use of smart contracts to automate processes and reduce the need for intermediaries. The proposed model is meant to increase trust in the green finance market, improve efficiency, and reduce fraud. The proposed model will also enhance financial and investment transparency. Following the results of this research, the use of blockchain technology in green finance can have a significant positive impact on sustainable banking while also providing financial benefits and implicitly having a positive impact on the investment in green bonds facilitating sustainable investments.