Along　with　the　development　of　middleware　technology,　middleware　has　been　widely　used　in　many　applications,　especially　in　banking　systems　in　which　a　three-layer　structure　model　based　on　Tuxedo　can　be　used.　This　model　provides　multi-layer　structure,　communication,　transactions,　security,　fault　tolerance　and　many　other　basic　services　for　building　a　large-scale,　high-performance,　distributed　application.　This　paper　presents　BEA　Tuxedo　and　the　application　of　Tuxedo　in　a　banking　system.　©　2011　IEEE.