Abstract: From the viewpoint of macro dynamic characteristics of freeway traffic flow, this paper first presents a commonly used macroscopic dynamic deterministic traffic flow model for traffic control and simulation. Byinteg ration traffic survey data with simulation assumption, it gives parameter identification and optimization of the model by using computer simulation and optimization techniques, so we obtain a model which is capable of describing real traffic flow dynamic behavior more precisely. Then it proposes avariable speed limit control, on-ramp control and off-ramp diversion control models with optimal solutions for low, moderate and high traffic density sections. Finally, traffic flow with and without control is simulated by computer with satisfactory results.