Based on the commodity trade data between the 13 provinces (autonomous regions and municipalities) along the New Western Land-Sea Corridor and ASEAN from 2015 to 2022, this study employs five indicators to analyze the commodity trade patterns and evolutionary features between the regions along the New Western Land-Sea Corridor and ASEAN: the trade intensity index, the revealed comparative advantage index, the trade complementarity index, the Lawrence index, and the beneficiary index. The results show that: ① The total commodity trade volume between the regions along the New Western Land-Sea Corridor and ASEAN countries has consistently increased, accompanied by a growing trade surplus. Trade growth has expanded from the southwestern region to the northwestern region, with a widening radiation range. ②Guangxi, Sichuan, and Yunnan exhibit relatively high export dependence on ASEAN, while Chongqing, Guangxi, and Yunnan demonstrate relatively high import dependence on ASEAN. Throughout the study period, the export dependence of each region on ASEAN has slightly decreased, while import dependence has remained relatively stable. ③ The corridor regions demonstrate significant regional comparative advantages in the export of machinery and equipment, chemical products, and agricultural products, showcasing strong trade complementarity with ASEAN countries. ④Regarding the evolution of the commodity trade structure, the degree of structural change between the corridor regions and ASEAN countries has continuously diminished during the study period. Moreover, the export trade structure has evolved towards dynamic changes in import demand from ASEAN countries.