Abstract: Abstract: Dynamic model is the basis of control design and dynamic optimization for chemical process. This paper achieves the steady state and dynamic models of xylene isomerization reaction based on Aspen Platform. By means of the established model, the dynamic response of the key indicators of performance including the conversion of ethylbenzene, P xylene isomerization rate, and loss of aromatics of the reaction process are analyzed, under the effect operational variables including reaction temperature, reaction pressure, and reaction feed flow rate. Simulation results show that the proposed dynamic model has better uniformity with the steady state model, and the EB conversion rate, PX isomerization rate, and aromatic loss tally with the actual situation under the step change of reaction temperature, reaction pressure and reaction flow rate. Moreover, this control strategy can meet the switching operation among different steady states.