This paper introduces the application of fuzzy control in system modeling and utilizes the Linear Graph of mechanism modeling method to build the system model, and employs Simulink’s S-function to build the system controller and object to conduct simulation. In this paper, the double-ended component system is taken as an example to describe the linear graph theory commonly used in modeling, and the state space equation and the transfer function of the system are established and simulated based on the linear graph method. In the meantime, this paper also analyzes the merits and demerits of linear graph method and other mechanism modeling methods.