Efficient development of complex civil avionics system needs support of several kinds of integrated verification platforms.Firstly, the category of integrated verification platform is confirmed through analyzing the engineering activities of complex avionics system.Secondly, functions of integrated verification platform are analyzed, and the definition of universal functions is given.Thirdly, current status of integrated verification platform is analyzed by using the method of dimensional analysis, and optimization ideas are provided.Finally, top-level planning and unified design are performed for versatile device-level integrated verification platform, a universal design model is developed, and implementation specifications of the model are provided.