Through the introduction of embedded software platform design method, taking flight control software as design practice, general module decomposition and abstract interface design are carried out for each process of application layer of flight control software to realize framework and form the CBBs (common block) platform shelf, so that system designers can focus on the design of airborne business process and the definition of project customized data. The feasibility and effectiveness of platform design of embedded software are verified by closed-loop simulation and model airplane flight test.