In order to improve the quality of civil aircraft design and the efficiency of design evaluation, a multidisciplinary data fusion visualization method based on civil aircraft simulation data visualization engine is proposed, which can effectively integrate civil aircraft CAD models. Firstly, depending on the support of the mainstream CAD system for the file format of Standard for the Exchange of Product Model Data (STEP), an interface for parsing and reading STEP files is built on a generic simulation data visualization engine. Afterwards the design data and the related simulation data are stored into the scene tree data structure and displayed in a unified scene of the visualization software platform. The frame rates of interactive visualization are enhanced through PC cluster parallel render, which is convenient for engineers to interact with civil aircraft multidisciplinary data in real time. The platform integrates interactive visual analysis functions such as data sectioning, measurement, streamline extraction, etc. The integrated visualization platform supports full-scale stereo VR display, and can carry out collaborative evaluation in multi-channel immersive display system. Case studies are carried out to reveal and analyse the effect of multidisciplinary data fusion of civil aircraft, and demonstrate the feasibility and effectiveness of the platform.