Abstract: The aerospace discrete manufacturing systems face core challenges including dynamic evolution of technical states, multi-domain coupling of process chains, full process traceability of quality control, and establishment of cross-organizational collaborative networks. Traditional monolithic architectures struggle to meet the flexibility requirements of multi-variety and small-batch production modes. A microservices-based industrial Internet platform architecture built on a unified technological foundation is proposed. By constructing a dual-middle platform system integrating business capability reuse and data value mining driven by both business and data initiatives, forming a collaborative development framework that integrates standardized platform support with scenario-based App applications. Results demonstrate that this architecture leverages service decoupling and data integration to achieve 100% coverage of core business functions and a 90% improvement in quality traceability timeliness. It establishes a closed-loop management mechanism encompassing "data-business-decision" for developing complex aerospace products, providing a scalable systematic solution for digital transformation and smart factory construction in discrete manufacturing enterprises.