ARM processor and μC/OSⅡ operating system as the core of embedded technology has been widely applied in low cost and micro realtime system. In the paper, the research object of micro unmanned helicopter flight control system using LPC2468 micro controller, application soft design based on the μC/OSⅡ operating system. For multihardware interrupt and μC/OSⅡ many task management scheduling mechanism combing the running of flight control software. To meet the requirements of the system stability and reliability of the engineering application, launches the corresponding research of μC/OSⅡ system transplantation driver development and flight control software structure design. Finally, we tested the whole system.