Abstract: The inter-provincial electricity spot market has been continuously operating for more than two years. Based on the implementation of inter-provincial medium-and long-term transactions, it has achieved market-oriented electricity surplus and shortage mutual assistance and large-scale optimal allocation of resources. The practice shows that the inter-provincial electricity spot market has played an important role in improving the supply capacity of the whole power grid and promoting the consumption of clean energy. Firstly, this paper describes the trial operation and effectiveness of the inter-provincial electricity spot market since 2022. Secondly, the mechanism of inter-provincial electricity spot trading is analyzed from the market framework, the clearing mechanism, and the declaring mechanism. Finally, based on the current situation of inter-provincial electricity spot market construction, the future development directions are prospected.