SOA(service-oriented architecture)架构电子商务系统能够很好地解决业务的协同和信息的共享等问题,但这也使得系统面临着新的安全挑战。为解决SOA架构电子商务下的安全问题,提出了一个基于SOA的旅游电子商务系统安全模型,在传统安全解决方案的基础上,扩展现有安全技术,使其在3个层次实现安全需求,保证了服务请求者和提供者之间消息传输的安全可靠。 SOA (service-oriented architecture) architecture e-commerce system can well solve the business collaboration and information sharing and other issues, but it also makes the system is facing new security challenges. In order to solve the security problem of SOA architecture e-commerce, this paper proposes a SOA-based tourism e-commerce system security model. Based on the traditional security solutions, the existing security technologies are extended to implement security requirements at three levels, The message between the service requester and the provider is safe and secure.