Microservices architecture, as an agile and resilient software design paradigm, has been widely applied in the field of software development. However, with the increasing number of microservices, the complexity of the systems rises, and the service quality of the system decreases. Enhancing the quality of online business service under the microservices architecture is a critical challenge. Optimization of service links is a key aspect in addressing this challenge. This work conducts an in-depth study of service links under the microservices architecture and proposes various link analysis methods, including link sampling, link topology generation, strong and weak dependency determination, identification of cyclic calls, and recognition of redundant and ineffective calls. Building upon these methods, the study implements a series of effective optimization strategies, such as robust testing, disassembling cyclic calls, reducing and merging redundant calls, fault self-healing, and link tracing. These strategies effectively improve the service quality of production and operation system services under the microservices architecture.