With the rapid development of internet technology,e-business has become an important part of modern commerce.The article analyzes the business requirements of e-commerce platforms and determines the system's functional module,based on Spring Cloud to build microservice architecture,achieves service splitting and independent deployment.Furthermore,by analyzing the security design of the system,including authentication and authorization,data encryption,performance testing has revealed the existence of propose corresponding solutions to address the issues and provide reference for the design of e-commerce platforms.