In recent years，the process of economic globalization has been further developed，the trade exchanges between countries are getting closer and closer，and the scale of international trade is increasing. With the popularity of the Internet，the maturity of payment methods and the continuous improvement of logistics services，the cross-border e-commerce platform has shown a strong development momentum in international trade，and the demand for cross-border payment connected with it will also increase. However，the traditional cross-border payment mode has some problems，such as complicated business，high cost，long processing cycle and low settlement efficiency. In the face of these problems，blockchain technology provides new ideas for international trade cross-border payment mode. The blockchain technology is applied to the field of cross-border payment in international trade，which makes use of its decentralization，information tampering，transparency，security and other characteristics to simplify the reconciliation process，shorten the cross-border payment transaction cycle，reduce costs and improve the security of transactions，the combination of “blockchain technology+cross-border payment” brings confidence and hope for cross-border payment，and provides a solid backing for the application of blockchain in the field of trade payment.