This study investigates the implementation and challenges of environmental law within the Nusantara Capital City development project. The Nusantara Capital City initiative aims to establish a new capital in Indonesia to address issues like overpopulation, developmental imbalances, and environmental problems in Jakar-ta. However, this ambitious project also carries significant environmental conse-quences. The research analyzes Indonesia's environmental laws, regulations, and policies related to the Nusantara Capital City, conducting a thorough literature re-view on the practical application of environmental law in urban development. The findings reveal numerous challenges in effectively implementing environmental law for the Nusantara Capital City. Addressing complex environmental issues, such as ecosystem degradation, resource sustainability, and climate change, pre-sents substantial hurdles. Successful implementation relies on seamless coordina-tion among diverse stakeholders and sectors. Moreover, robust monitoring mechanisms and stringent law enforcement are essential to ensure compliance with en-vironmental regulations in the Nusantara Capital City. To enhance implementation and overcome these challenges, the study offers recommendations. These include expanding public participation in environmental decision-making, improving the capacity and coordination of governmental institutions, and strengthening over-sight and law enforcement mechanisms. This research holds significant im-portance for the Nusantara Capital City's development and environmental man-agement in Indonesia. Its findings and recommendations are expected to contrib-ute significantly to shaping sustainable policies and enhancing environmental pro-tection in the evolving urban landscape.