Abstract: The resource endowment and energy demand in China are in reverse distribution, and promoting the optimal allocation of renewable energy resources in a wider range is an inherent requirement for the construction of new power system of China. The trans-provincial/trans-regional transmission price is an important part of the trans-provincial/trans-regional electricity transaction price, and the rationality of its pricing mechanism will not only affect the reasonable recovery of the investment costs of power transmission projects, but also affect the efficiency of the electricity market competition, even the optimal allocation of resources in a wider range. To this end, based on combining the current situation of trans-provincial/trans-regional and transnational/interstate transmission projects in typical electricity markets in China, Europe, and the United States, the historical evolution and development situation of transnational/interstate and inter-market transmission pricing mechanisms in typical international electricity markets are sorted out, and the key factors influencing the transnational/interstate and inter-market transmission pricing are explored. Combined with the historical development of the transmission pricing mechanism of the trans-provincial/transregional dedicated projects in China, the problems that the current transmission pricing mechanism for trans-provincial/transregional dedicated projects will face in the background of new power system and the construction of the national unified electricity market system are analyzed, and its enlightenment and the future development direction for the transmission pricing of transprovincial/trans-regional dedicated projects in China are put forward.