Abstract: In view of the problems in product innovative design when adopting the model-based systems engineering(MBSE)ideas,such as the need for a lot of additional modeling work,the difficulty to reuse existing rich design experience,low efficiency of design scheme generation,taking high voltage system of electric motor unit(EMU)as the research object,this paper puts forward a set of complete system architecture of intelligent and efficient generation process,enables the intelligent innovation design of EMU high voltage system.The specific contents are as follows.Based on MBSE,the meta model of system modeling language(SysML)is extended.The function and components libraries of EMU high voltage system are built.By reusing existing design experience,a set of complete and feasible EMU function to the component mapping rules is defined to efficiently generate the candidate design solutions.Taking China’s standard 250 km/h EMU high voltage system as experimental object,the method for a given function of the EMU model can automatically generate a valid candidate with five system architectures.Moreover,from the five indicators of functional,robustness,risks,costs and overall performance evaluation,these candidates can improve the efficiency of EMU system modeling and inspire the innovation ability.