Abstract: Discrete timed Petri nets is an effective tools for system simulation and analysis, and can be used to evaluate the performance of discrete system dynamically In this paper, a fuzzy model of discrete timed Petri nets based on T S fuzzy model id proposed, and the condition to represent exactly a TtPNs is analyzed Finally, the fuzzy control for TtPNs and the conclusion of TtPNs’ aggregation are given