RCEP has brought new momentum to the development of China''s cross-border e-commerce exports and provided new opportunities for economic and trade exchanges among member countries.Based on the expanded trade gravity model，this paper selects panel data from 2010 to 2021 to empirically tests the influencing factors and trade potential of China''s cross-border e-commerce exports to RCEP member countries.Research shows that cross-border e-commerce export transaction volume is positively correlated with economic scale，consumption gap，trade openness，internet informatization level and population， and negatively correlated with geographical distance.In terms of trade potential，9 of the 14 RCEP member countries have huge potential， 3 of them have developing potential，and 2 of them need potential reconstruction.We should seize the demographic dividend in Southeast Asia to expand the scale of cross-border e-commerce exports；improve cross-border infrastructure construction to shorten trade distances；and adopt differentiated strategies for countries with different trade potentials.