Vigorously developing offshore renewable energy power has become a crucial pathway for many coastal States to alleviate energy shortages and ensure energy security, as well as to implement clean and low-carbon energy transitions for addressing climate change. For China, it is also integral to building Strong Maritime Nation and Strong Energy Nation, as well as advancing the Four Global Initiatives in the maritime domain. However, China’s current electricity legal rules have three types of provisions regarding their geographical jurisdiction scopes. In particular, the Electricity Law of the PRC, which is of foundational and overarching for electricity legal rules, only regulates electricity activities within China’s territory, leading to dilemmas and contradictions with the systemic, holistic, synergistic and timely characteristics of legislations. This has resulted in a lack of necessary legal regulation for electricity activities in China’s EEZ and continental shelf, thereby hindering the high-quality development of renewable energy power within these two areas. This paper elucidates the international legal foundation and legislative jurisdiction for coastal States to regulate renewable energy power activities in their EEZs and continental shelves, reviews and analyzes four main legislative models adopted by foreign coastal States in geographical jurisdiction scopes of their electricity legal rules in these two areas, and proposes and justifies pathways for modifying the current China’s electricity legal rules and extending their geographical jurisdiction scopes to the EEZ and continental shelf. The proposed pathways include that, (i) the Electricity Law and related laws explicitly stipulate that their geographical jurisdiction scopes cover other sea areas under the China’s jurisdiction, and (ii) either adding a dedicated chapter in the Electricity Law, or enacting a separate special law such as “Maritime Electricity Law”.