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Interface communication technique for a PCI-1553b bus card based on Delphi platform is introduced. It includes the programming techniques of definition of periodic-message and non-synchronous message,message transmission fault-retry,message data interrupt sampling, message data updating and message transmission monitoring of bus . And with designing an electrical control simulator system based on 1553b bus card and Delphi platform, BC->RT,RT->BC and BM bus monitoring function of 1553b bus are verified. Application has showed that, with using Delphi developing 1553b bus technique and with its approving of database, comparing to other language, this technique can build communication test system based on 1553b bus quickly. 