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To further resolve the problems that were brought by the existing research tools of complex system brittleness theory, such as system state describe difficulties or too critical constraint conditions about system boundary, this paper introduced colored Petri nets into the research on complex system brittleness measurement. The colored Petri nets,its simulation tool CPN Tools and the existing advanced state space tools were helpful to reduce the system complexity in modeling and quantification. This paper brought forward complex system brittleness measurement index,and gave the programming workflow. Lastly a numerical example illustrates that the node brittleness propagation process and its influence range in state space can reflect the system brittleness. [ABSTRACT FROM AUTHOR]