Abstract: In view of the problems such as inflexible program change, difficult maintenance and management, poor compatibility, lack of generality, slow data processing and tedious page operation, this article summarized the needs of the capital clearing center, designed and developed the international railway intermodal clearing system by using the key technologies of data extraction, data structure optimization and storage optimization. The system ensures and improves the accuracy and timeliness of international intermodal transportation clearing, implements the informatization of part of international railway intermodal communication with foreign countries, and develops synchronously with domestic passenger and information based freight clearing.