Complex nuclear fuel cycle system faces many socio-technical issues that need to obtain the consensus between stakeholders in different knowledge background. In this paper, a visualized analysis platform based on graphical functional modeling method, Multilevel Flow Model(MFM), was proposed to help those stakeholders to recognize and analyze various socio-technical issues in nuclear fuel cycle system. There are some new functions, such as ¡ÈReaction Function¡É, ¡ÈSwitch Function¡É and ¡ÈConversion Function¡É, introduced to adapt new simulation tasks for nuclear fuel cycle system. Based upon this methodology, a micro-process and a macro-process of nuclear fuel cycle system were simulated and meanwhile some key analysis variable required by some analysis method were deducted and displayed in the platform. And final the simply simulation analysis results was represented.